From unknown Sat Sep 06 09:45:43 2025 X-Loop: help-debbugs@gnu.org Subject: bug#74055: 31.0.50; color-lighten-name not lightening black Resent-From: Gerd =?UTF-8?Q?M=C3=B6llmann?= Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Mon, 28 Oct 2024 08:29:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: report 74055 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: 74055@debbugs.gnu.org X-Debbugs-Original-To: bug-gnu-emacs@gnu.org Received: via spool by submit@debbugs.gnu.org id=B.173010409411404 (code B ref -1); Mon, 28 Oct 2024 08:29:02 +0000 Received: (at submit) by debbugs.gnu.org; 28 Oct 2024 08:28:14 +0000 Received: from localhost ([127.0.0.1]:52369 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1t5L6k-0002xr-25 for submit@debbugs.gnu.org; Mon, 28 Oct 2024 04:28:14 -0400 Received: from lists.gnu.org ([209.51.188.17]:37456) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1t5L6h-0002xc-0C for submit@debbugs.gnu.org; Mon, 28 Oct 2024 04:28:11 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1t5L66-0004TR-Ii for bug-gnu-emacs@gnu.org; Mon, 28 Oct 2024 04:27:34 -0400 Received: from mail-wm1-x32f.google.com ([2a00:1450:4864:20::32f]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1t5L65-0001Qg-10 for bug-gnu-emacs@gnu.org; Mon, 28 Oct 2024 04:27:34 -0400 Received: by mail-wm1-x32f.google.com with SMTP id 5b1f17b1804b1-4314fa33a35so39291355e9.1 for ; Mon, 28 Oct 2024 01:27:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1730104051; x=1730708851; darn=gnu.org; h=mime-version:message-id:date:subject:to:from:from:to:cc:subject :date:message-id:reply-to; bh=aOrtbCHMsgAnoef7l4fso9n5bZnb2pxQHs0MWcNQm7I=; b=LQvOPox7PpIN3OUFNWEEId//E/3Br+o98T7BwQymedGQpB94G6MlRNKANn7+aNlgG1 amm28wHaWB4ZW9jiA7tg1T4kub1AX2Zkbe1Qrqm8x7XbLXXehGzG6Yjo3BMB7AqZK6ik ZgNNneq1gkuUYt38r4sR/g3T6Zjy+7lPC3BUFLViLgsUDBx5k18PsE5c79nLBTkAVOwP Of7FNOZ5sSp7NonoflDfMcnduUES346FmXlYus9MMrpT/i96y42/jq9y6B+EaECI3aAh xAMgjLaANaF8iEEMbRAzEP3xkS4VrhMWdz1urxb0BxUPbUi2B3Lx2iUmwiWcpkLzS76a 4M3g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1730104051; x=1730708851; h=mime-version:message-id:date:subject:to:from:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=aOrtbCHMsgAnoef7l4fso9n5bZnb2pxQHs0MWcNQm7I=; b=HjPY+sU1xEIlOU/xmqyHtKYrarjaNMo2xp5USH5jvexVYzJeq6j5Q9rl3orVo9snEs QVo/h5Lb58HbUPzIFGTg2/IoVPiYUp4+//+Gd7o+RKjV26lzjQ4Qya1lBVnPPtCWoF0h oVHOBrIJDMWj8qBGIJYoTzjpnUaYnoyPnuEjRtI+Ib/eOTXNuwsrRgBDoN1zeIc7UFVQ Ox0k2f7FPyl19MpWRcMsJvJdLSVPf/ACTjCnq+oVDzuRScQcZsf0dfKGRIAXMKRMy6fi jUiMJpK0x4+3vdl1pTmUg2eMtgOiHUPZGFMwa1rxUpC39+eqdlRLccdRs5jTdza+2cC0 yFaQ== X-Gm-Message-State: AOJu0YzpmDQ1sTYKIE5OG/m/IJNSO9OmRJSjWYBQfy7D0uoofzTK9+Dl T3Bl4iAlD2Fob9e4k6yDY/EGD9YzpJ5wkY7TeODyl2kU4pJsVtkocb2GhQ== X-Google-Smtp-Source: AGHT+IFKWa7Z23tXOr1lB1RGOmkV+L6xE8ri/IUNL0ARfs3hfdYnch3hXknI2ysS1Gnx3N47qvw9Ig== X-Received: by 2002:a05:600c:4708:b0:431:5187:28dd with SMTP id 5b1f17b1804b1-4319ad0c2ddmr59848635e9.28.1730104050985; Mon, 28 Oct 2024 01:27:30 -0700 (PDT) Received: from pro2 (p4fe3a2b7.dip0.t-ipconnect.de. [79.227.162.183]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-38058b91f43sm8881732f8f.92.2024.10.28.01.27.30 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 28 Oct 2024 01:27:30 -0700 (PDT) From: Gerd =?UTF-8?Q?M=C3=B6llmann?= Date: Mon, 28 Oct 2024 09:27:29 +0100 Message-ID: MIME-Version: 1.0 Content-Type: text/plain Received-SPF: pass client-ip=2a00:1450:4864:20::32f; envelope-from=gerd.moellmann@gmail.com; helo=mail-wm1-x32f.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-Spam-Score: -1.3 (-) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -2.3 (--) The function color-lighten-name doesn't work as I would expect for black: (color-lighten-name "#000000" 50) => "#000000000000" I think there is even a test that checks that, in color-tests.el: (ert-deftest color-tests-lighten-name () (should (equal (color-lighten-name "black" 100) "#000000000000")) I don't understand this, and it is different from what I'd expect, and tools for the web return, for example https://mdigi.tools/lighten-color/#000000 In GNU Emacs 31.0.50 (build 1, aarch64-apple-darwin24.0.0, NS appkit-2566.00 Version 15.0.1 (Build 24A348)) of 2024-10-28 built on pro2 Repository revision: ea685170063b59855322ceffdeaaab4acaf8e388 Repository branch: master Windowing system distributor 'Apple', version 10.3.2566 System Description: macOS 15.0.1 From unknown Sat Sep 06 09:45:43 2025 X-Loop: help-debbugs@gnu.org Subject: bug#74055: 31.0.50; color-lighten-name not lightening black Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Mon, 28 Oct 2024 12:41:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 74055 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: Gerd =?UTF-8?Q?M=C3=B6llmann?= , Julien Danjou , Mattias =?UTF-8?Q?Engdeg=C3=A5rd?= Cc: Noah Friedman , 74055@debbugs.gnu.org Received: via spool by 74055-submit@debbugs.gnu.org id=B74055.173011922124227 (code B ref 74055); Mon, 28 Oct 2024 12:41:02 +0000 Received: (at 74055) by debbugs.gnu.org; 28 Oct 2024 12:40:21 +0000 Received: from localhost ([127.0.0.1]:52849 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1t5P2j-0006Ig-0q for submit@debbugs.gnu.org; Mon, 28 Oct 2024 08:40:21 -0400 Received: from eggs.gnu.org ([209.51.188.92]:42634) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1t5P2e-0006IQ-1r for 74055@debbugs.gnu.org; Mon, 28 Oct 2024 08:40:19 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1t5P1v-0005UL-0s; Mon, 28 Oct 2024 08:39:31 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=MIME-version:References:Subject:In-Reply-To:To:From: Date; bh=wL0Qq3jCMzJ8iT0UITT472QS4KOBf0dnMI+VDluI7UU=; b=gOleJecadzVlOthuDBhU LUhure+gtVpFB3XF/IbbxObU3M4vzHrRCyfPf6byBO3DDxilDbmbSPQ+W2+ClFzc7MbzWPAxratMi ngi5Zf5dSOT183z7Pd4g900W1FY7ITlg5tRESA1Tx2SiU4C9GD2XwYN0dkoXS6Rfldyy76XZrJCRc tM8ZTnNaNpDPbUo+NTNdDfIliJIKBuN4KE8xahqcKSJ89L6UZPJxasIxhoVV0aYNoI0YvG5PyuIpK Ith9o6TtNaLPKjNhsG9hjLtzRswk1jpz158KynR2Qq+0ZgcWDs4fSGwTdfOoKm8O2MRXGOVMf28OK ZOVJ9a/En7ZrQw==; Date: Mon, 28 Oct 2024 14:39:17 +0200 Message-Id: <86plnk766i.fsf@gnu.org> From: Eli Zaretskii In-Reply-To: (message from Gerd =?UTF-8?Q?M=C3=B6llmann?= on Mon, 28 Oct 2024 09:27:29 +0100) References: MIME-version: 1.0 Content-type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Spam-Score: -2.3 (--) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -3.3 (---) > From: Gerd Möllmann > Date: Mon, 28 Oct 2024 09:27:29 +0100 > > The function color-lighten-name doesn't work as I would expect for > black: > > (color-lighten-name "#000000" 50) > => "#000000000000" > > I think there is even a test that checks that, in color-tests.el: > > (ert-deftest color-tests-lighten-name () > (should (equal (color-lighten-name "black" 100) "#000000000000")) > > I don't understand this, and it is different from what I'd expect, and > tools for the web return, for example > > https://mdigi.tools/lighten-color/#000000 Our notion of "lighten color" seems to be to increase the color's luminance by P percent. Since the black color's luminance is zero, increasing that by 50% still yields zero. By contrast, the page you point to seems to interpret "lighten" to mean that P is the percentage of the full scale, not of the original color's luminance. This goes back to commit 656c2dd66e, which was supposed to fix bug#54514. But maybe Noah's interpretation of "lighten" was incorrect, and we should revert that change? OTOH, if we do revert it, then Noah's example will disagree with the above page. So I guess our algorithm is incorrect somewhere? Adding Julien and Mattias, in the hope that they could help unconfuse us. From unknown Sat Sep 06 09:45:43 2025 X-Loop: help-debbugs@gnu.org Subject: bug#74055: 31.0.50; color-lighten-name not lightening black Resent-From: Ship Mints Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Mon, 28 Oct 2024 15:21:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 74055 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: Eli Zaretskii Cc: Gerd =?UTF-8?Q?M=C3=B6llmann?= , Julien Danjou , Noah Friedman , 74055@debbugs.gnu.org, Mattias =?UTF-8?Q?Engdeg=C3=A5rd?= Received: via spool by 74055-submit@debbugs.gnu.org id=B74055.173012881321722 (code B ref 74055); Mon, 28 Oct 2024 15:21:01 +0000 Received: (at 74055) by debbugs.gnu.org; 28 Oct 2024 15:20:13 +0000 Received: from localhost ([127.0.0.1]:54390 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1t5RXQ-0005eI-K5 for submit@debbugs.gnu.org; Mon, 28 Oct 2024 11:20:13 -0400 Received: from mail-oi1-f174.google.com ([209.85.167.174]:44175) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1t5RXO-0005eA-Dm for 74055@debbugs.gnu.org; Mon, 28 Oct 2024 11:20:11 -0400 Received: by mail-oi1-f174.google.com with SMTP id 5614622812f47-3e606cba08eso2594406b6e.0 for <74055@debbugs.gnu.org>; Mon, 28 Oct 2024 08:19:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1730128713; x=1730733513; darn=debbugs.gnu.org; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:from:to:cc:subject:date:message-id:reply-to; bh=EGFZ6AbaX2LeOZsJlviGiIdFn71E8XweTdV+lOhLBVY=; b=bW/0AgvTorPISEaxgD11Ha/O+UoeBHDrVgVYc6sUJDGiczv3P7ygyAmR8eXLNB+yjI BZ4xzU1tHcYWWDf5l2riCYvS+Au2fyIec441KNg0174raF0Yc8UH9WUPVi8714W0aBIH w1Vhdl43Dvgyk+b/RNV+1yI1aPfO+PBSLgvs6FxHaDt757kv0Mz5FGj5IKYzBkbE1Q/Y CjhXLEe+KXLngfjfZVhwiVQiLn91asYhlKB9RVSbIUmZEMYSAXTjPTbSISVhAszalIiE 80EZhT8lbFlh6AvwtGFNJYjiUNrLjV+pocA7GT7lwKOiAOpq72FM391hqs+xHZ0qy3Vz MR3w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1730128713; x=1730733513; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=EGFZ6AbaX2LeOZsJlviGiIdFn71E8XweTdV+lOhLBVY=; b=dj1hQ8DFaI7y5UtmUzb2HB9kwAe2JNrBu4coRBX8kg/BD3wiVRFOvAr9iktQ1gnZzS VVKijb6F6YiHOu6qKQJWpT8DynfQsIcIKtTyNAbN/rlSCvrl3WhM0HO1tI2m2gMpKXtM pKzBzkwefWoJWr9+DU8Wb8YHEiVdsC4USNZnnJphp/A3uA15J62gb9zR9llluJ/J1+/0 2nyKxmAqvFuIQRRWZnrxYhGWfsCF1BxnmfrZHFKpa7ME3zzPOzCuzUgzvM5wmI+VVu8p aqeKjTkmuxGon7Mc157txSJcpOvcQCZksKl4rvxuB1hJP4N0J8lbMgaqaQjWutX7lOzR yxnA== X-Forwarded-Encrypted: i=1; AJvYcCXCv26SyoSGri7OAdhvss8/+LQHdHx7RswMntHC+KjeWwEo/KKKUMKgVjvTgm+eZrDr3pfD7Q==@debbugs.gnu.org X-Gm-Message-State: AOJu0YxYinJ4MiS6kygfZ/7EaTw1dtoO+Vh7CSB+FLeR3mJLmWboyYc0 1Cey9o0itjekGpQ/2PW+Hddod8eV+Ch9yK9ckEivHOU3FJcMIYMKxQWyFprrWvx218l/Y0C+3rF bboaZGDChWs7UMDxsIFAGtQEGa98= X-Google-Smtp-Source: AGHT+IGBYmL1Xd0voX5ScGjf2B+1+lkVm7RYFXD37rUPoig+VYr+UDCP84KapZp/boweN2s6JgplhcraWV+w1Gy5UGI= X-Received: by 2002:a05:6808:1924:b0:3e2:8483:dbe3 with SMTP id 5614622812f47-3e6384901a2mr7326742b6e.35.1730128713390; Mon, 28 Oct 2024 08:18:33 -0700 (PDT) MIME-Version: 1.0 References: <86plnk766i.fsf@gnu.org> In-Reply-To: <86plnk766i.fsf@gnu.org> From: Ship Mints Date: Mon, 28 Oct 2024 11:18:22 -0400 Message-ID: Content-Type: multipart/alternative; boundary="00000000000060a3c406258afb7c" X-Spam-Score: 0.0 (/) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -1.0 (-) --00000000000060a3c406258afb7c Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable I use below to compute adjusted colors given that lighten doesn't work when black multipliers are all zero. (defun my/color-rgb-transform-by-frac (c1 c2 frac) "Compute RGB color from C1 adjusted closer to C2 by FRAC. FRAC is a floating-point number between 0 and 1." (cl-destructuring-bind (c1-r c1-g c1-b) c1 (cl-destructuring-bind (c2-r c2-g c2-b) c2 (list (+ c1-r (* (- c2-r c1-r) frac)) (+ c1-g (* (- c2-g c1-g) frac)) (+ c1-b (* (- c2-b c1-b) frac)))))) (defun my/color-hex-transform-by-frac (c1 c2 frac) "Compute hex color from C1 adjusted closer to C2 by FRAC. FRAC is a floating-point number between 0 and 1." (apply #'color-rgb-to-hex (my/color-rgb-transform-by-frac (color-name-to-rgb c1) (color-name-to-rgb c2) frac))) ;; e.g., (my/color-hex-transform-by-frac "black" "white" 0.10) ; produces "#199919991999" (color-lighten-name "black" 10) ; produces "#000000000000" On Mon, Oct 28, 2024 at 8:40=E2=80=AFAM Eli Zaretskii wrote: > > From: Gerd M=C3=B6llmann > > Date: Mon, 28 Oct 2024 09:27:29 +0100 > > > > The function color-lighten-name doesn't work as I would expect for > > black: > > > > (color-lighten-name "#000000" 50) > > =3D> "#000000000000" > > > > I think there is even a test that checks that, in color-tests.el: > > > > (ert-deftest color-tests-lighten-name () > > (should (equal (color-lighten-name "black" 100) "#000000000000")) > > > > I don't understand this, and it is different from what I'd expect, and > > tools for the web return, for example > > > > https://mdigi.tools/lighten-color/#000000 > > Our notion of "lighten color" seems to be to increase the color's > luminance by P percent. Since the black color's luminance is zero, > increasing that by 50% still yields zero. > > By contrast, the page you point to seems to interpret "lighten" to > mean that P is the percentage of the full scale, not of the original > color's luminance. > > This goes back to commit 656c2dd66e, which was supposed to fix > bug#54514. But maybe Noah's interpretation of "lighten" was > incorrect, and we should revert that change? OTOH, if we do revert > it, then Noah's example will disagree with the above page. > > So I guess our algorithm is incorrect somewhere? > > Adding Julien and Mattias, in the hope that they could help unconfuse > us. > > > > --00000000000060a3c406258afb7c Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
I use below to compute adjusted colors given that lighten doesn't wo= rk when black multipliers are all zero.

(defun my/color-rgb-transform-by-frac (c1 c2 fra= c)
=C2=A0 "Compute RGB color from C1 adjusted closer to C2 by FRAC.=
FRAC is a floating-point number between 0 and 1."
=C2=A0 (cl-de= structuring-bind (c1-r c1-g c1-b) c1
=C2=A0 =C2=A0 (cl-destructuring-bin= d (c2-r c2-g c2-b) c2
=C2=A0 =C2=A0 =C2=A0 (list (+ c1-r (* (- c2-r c1-r= ) frac))
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 (+ c1-g (* (- c2-g c1= -g) frac))
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 (+ c1-b (* (- c2-b = c1-b) frac))))))

(defun my/color-hex-transform-by-frac (c1 c2 frac)<= br>=C2=A0 "Compute hex color from C1 adjusted closer to C2 by FRAC.FRAC is a floating-point number between 0 and 1."
=C2=A0 (apply #&= #39;color-rgb-to-hex
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0(my/color-rgb-tra= nsform-by-frac (color-name-to-rgb c1)
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0= =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0(color-name-to-rgb c2)
=C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0frac)))

=
;; e.g.,
=
(my/color-hex-= transform-by-frac "black"
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 "white"
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 0.10) ; prod= uces=C2=A0"#199919991999"
(color-lighten-name "black" 10) ; = produces=C2=A0"#000000000000"

On Mon, Oct 28, 2024 at 8:40= =E2=80=AFAM Eli Zaretskii <eliz@gnu.org<= /a>> wrote:
&= gt; From: Gerd M=C3=B6llmann <gerd.moellmann@gmail.com>
> Date: Mon, 28 Oct 2024 09:27:29 +0100
>
> The function color-lighten-name doesn't work as I would expect for=
> black:
>
>=C2=A0 =C2=A0(color-lighten-name "#000000" 50)
>=C2=A0 =C2=A0=3D> "#000000000000"
>
> I think there is even a test that checks that, in color-tests.el:
>
> (ert-deftest color-tests-lighten-name ()
>=C2=A0 =C2=A0(should (equal (color-lighten-name "black" 100) = "#000000000000"))
>
> I don't understand this, and it is different from what I'd exp= ect, and
> tools for the web return, for example
>
>=C2=A0 =C2=A0https://mdigi.tools/lighten-color/#000000=

Our notion of "lighten color" seems to be to increase the color&#= 39;s
luminance by P percent.=C2=A0 Since the black color's luminance is zero= ,
increasing that by 50% still yields zero.

By contrast, the page you point to seems to interpret "lighten" t= o
mean that P is the percentage of the full scale, not of the original
color's luminance.

This goes back to commit 656c2dd66e, which was supposed to fix
bug#54514.=C2=A0 But maybe Noah's interpretation of "lighten"= was
incorrect, and we should revert that change?=C2=A0 OTOH, if we do revert it, then Noah's example will disagree with the above page.

So I guess our algorithm is incorrect somewhere?

Adding Julien and Mattias, in the hope that they could help unconfuse
us.



--00000000000060a3c406258afb7c-- From unknown Sat Sep 06 09:45:43 2025 X-Loop: help-debbugs@gnu.org Subject: bug#74055: 31.0.50; color-lighten-name not lightening black Resent-From: Mattias =?UTF-8?Q?Engdeg=C3=A5rd?= Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Mon, 28 Oct 2024 17:00:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 74055 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: Eli Zaretskii Cc: Gerd =?UTF-8?Q?M=C3=B6llmann?= , Julien Danjou , Noah Friedman , 74055@debbugs.gnu.org Received: via spool by 74055-submit@debbugs.gnu.org id=B74055.17301347766652 (code B ref 74055); Mon, 28 Oct 2024 17:00:02 +0000 Received: (at 74055) by debbugs.gnu.org; 28 Oct 2024 16:59:36 +0000 Received: from localhost ([127.0.0.1]:54552 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1t5T5c-0001jD-5l for submit@debbugs.gnu.org; Mon, 28 Oct 2024 12:59:36 -0400 Received: from mail-lf1-f49.google.com ([209.85.167.49]:47111) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1t5T5a-0001j0-7D for 74055@debbugs.gnu.org; Mon, 28 Oct 2024 12:59:35 -0400 Received: by mail-lf1-f49.google.com with SMTP id 2adb3069b0e04-539e6c754bdso4036500e87.2 for <74055@debbugs.gnu.org>; Mon, 28 Oct 2024 09:58:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1730134671; x=1730739471; darn=debbugs.gnu.org; h=to:references:message-id:content-transfer-encoding:cc:date :in-reply-to:from:subject:mime-version:sender:from:to:cc:subject :date:message-id:reply-to; bh=1WR6f1TtkknjfthQrKG7fY7JaSvlMqq+yQrvyjwfuOs=; b=Ub2NMM1sC4YYQ37UlNLkTGOIn8bJ6NdjQmYTM+66/EmflufJY3VojacSiuJzI0ynAd OhlH1wclWCehymzOHQEXL48b+voPOnsDZ0qjXv+5CoKyw6Vd7e6Nk3sGQPIeR4K2gV00 rN4so4YlPd6wW7Hmjhx9lo6elcY1SrMWPIcjG0GDqshxjtadQ/kuKTI6ist3F0F/cOLK UjkIC3fd7p4yf3t2aKAFfUsC0IB3dEdfeuepmA8GCNsRmINUnlCWsJoe+JQ1Fy93bene aBId0hpbiw/csMvieJkq5Jjszgp8L2LHbqXAhlqXs7MgI3zdHhYGsYe8PPWHG/F4JJUL M4VA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1730134671; x=1730739471; h=to:references:message-id:content-transfer-encoding:cc:date :in-reply-to:from:subject:mime-version:sender:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=1WR6f1TtkknjfthQrKG7fY7JaSvlMqq+yQrvyjwfuOs=; b=Vqm+SetGE2TJsFuhlJGR4ApM8OP7TUO0PO04LpQaf/F5rT6SWf7bxqkdLWEPUAyeJm ItW/S1OjXjpLXCpanJDFPV0OkKXW+U7/Wv75ddtwdvbnqyfQDopBqdjTsp5PEhv52ztG Rbg+VJUR4X9Bfe4uiTDFWVP2g4b8nvmDUcaSIfy/sV9cl4s6fDZ9HiuWUhkZHBvhRGq4 mxx8jyF4e2hdK7FJFD/H51jx4HV7BcHhEh+0YrxJv3QtLsbanM57rMcqGtL9uwHKdfR/ Yq/Sp2E5NaoNH7IWnyrXnCi5NaqaxDFJRm31NYPjYa72mLlB4zanxi099+XRhg6qAIgA lYDQ== X-Forwarded-Encrypted: i=1; AJvYcCWoCGvmymwG1MZq6lF44XQyWmXqM1gEWP6LpTqDw2o8PLBxD2Q4eNekznbOAVE7LCtU8zTyVg==@debbugs.gnu.org X-Gm-Message-State: AOJu0Yyqo2w35S/S3+Hn26YIRH5tPk1l0Iegto6ufPKq2Qc6jOagwaP4 YsYla1h37k2YPTlYxyzl2aeW+9mwfLcQbl4eEePtCG6o8RUBTRFt X-Google-Smtp-Source: AGHT+IGR/m3hs5U7bUadLTcWa0IEmjlYWFIPf0cy0oV/dBf4MAnLwZLve+wVzDF7Ae6Q/FmzT0Oplg== X-Received: by 2002:a05:6512:230c:b0:539:ee04:2321 with SMTP id 2adb3069b0e04-53b348e761amr3357419e87.33.1730134670506; Mon, 28 Oct 2024 09:57:50 -0700 (PDT) Received: from smtpclient.apple (c188-150-183-180.bredband.tele2.se. [188.150.183.180]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-53b2e1e1552sm1137367e87.266.2024.10.28.09.57.49 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Mon, 28 Oct 2024 09:57:50 -0700 (PDT) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 14.0 \(3654.120.0.1.15\)) From: Mattias =?UTF-8?Q?Engdeg=C3=A5rd?= In-Reply-To: <86plnk766i.fsf@gnu.org> Date: Mon, 28 Oct 2024 17:57:49 +0100 Content-Transfer-Encoding: quoted-printable Message-Id: References: <86plnk766i.fsf@gnu.org> X-Mailer: Apple Mail (2.3654.120.0.1.15) X-Spam-Score: 0.0 (/) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -1.0 (-) 28 okt. 2024 kl. 13.39 skrev Eli Zaretskii : > Our notion of "lighten color" seems to be to increase the color's > luminance by P percent. Since the black color's luminance is zero, > increasing that by 50% still yields zero. >=20 > By contrast, the page you point to seems to interpret "lighten" to > mean that P is the percentage of the full scale, not of the original > color's luminance. >=20 > This goes back to commit 656c2dd66e, which was supposed to fix > bug#54514. But maybe Noah's interpretation of "lighten" was > incorrect, and we should revert that change? OTOH, if we do revert > it, then Noah's example will disagree with the above page. That change may have been made in haste. For example, it didn't touch = the corresponding saturate and desaturate functions which use similar = mechanics, so there is now an inconsistency in that respect. But which interpretation is better isn't obvious. It doesn't have much = to do with colour theory per se. As luminance is already a percentage of = sorts, it's not at all clear what it means by increasing it by a certain = percentage. Personally I wouldn't use either function because of how = ill-defined they are. From unknown Sat Sep 06 09:45:43 2025 X-Loop: help-debbugs@gnu.org Subject: bug#74055: 31.0.50; color-lighten-name not lightening black Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Mon, 28 Oct 2024 17:26:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 74055 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: Mattias =?UTF-8?Q?Engdeg=C3=A5rd?= Cc: gerd.moellmann@gmail.com, julien@danjou.info, noah@splode.com, 74055@debbugs.gnu.org Received: via spool by 74055-submit@debbugs.gnu.org id=B74055.173013634611416 (code B ref 74055); Mon, 28 Oct 2024 17:26:01 +0000 Received: (at 74055) by debbugs.gnu.org; 28 Oct 2024 17:25:46 +0000 Received: from localhost ([127.0.0.1]:54602 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1t5TUv-0002y4-If for submit@debbugs.gnu.org; Mon, 28 Oct 2024 13:25:45 -0400 Received: from eggs.gnu.org ([209.51.188.92]:40426) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1t5TUt-0002xm-7R for 74055@debbugs.gnu.org; Mon, 28 Oct 2024 13:25:44 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1t5TUC-0005ko-9i; Mon, 28 Oct 2024 13:25:00 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=MIME-version:References:Subject:In-Reply-To:To:From: Date; bh=oBptvgIhECfNB68DPj2smqSgB+vxDUERZVb7H7PtjUQ=; b=j5rBd5tkYrBIwhYtcZ1D 8O6LxnXtHpksSZlWa5PVHf7xmKCCpc5ZqMh3g4jqRti6ipjm0RvhCYgvlOg7LltEU3/G8QCcaFduq QLVl/o8kTiOKZ0VAQB/kPNzMt7A37I6tGPlj8uJIow/zT515fU6mAdvuAKnqbLORqTlVycXd8GeBC WIYtf8h/LfXbHDvfaPbWriZ4j5VdFTXYNVr9RYGyBJrGtC8YxDB1+c4apJA4X7lkMZN/FLkkgcoe/ +vDZgUuvbHblt30SCKSACQaI7fJ3MYPRn3w1J9wx9GghWNDPgYoi1Zuk5iIhmE7cSszYlz1bGZbHi dmVN6TgIj64a2A==; Date: Mon, 28 Oct 2024 19:24:28 +0200 Message-Id: <86cyjk6sz7.fsf@gnu.org> From: Eli Zaretskii In-Reply-To: (message from Mattias =?UTF-8?Q?Engdeg=C3=A5rd?= on Mon, 28 Oct 2024 17:57:49 +0100) References: <86plnk766i.fsf@gnu.org> MIME-version: 1.0 Content-type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Spam-Score: -2.3 (--) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -3.3 (---) > From: Mattias Engdegård > Date: Mon, 28 Oct 2024 17:57:49 +0100 > Cc: Gerd Möllmann , > Julien Danjou , > 74055@debbugs.gnu.org, > Noah Friedman > > 28 okt. 2024 kl. 13.39 skrev Eli Zaretskii : > > > Our notion of "lighten color" seems to be to increase the color's > > luminance by P percent. Since the black color's luminance is zero, > > increasing that by 50% still yields zero. > > > > By contrast, the page you point to seems to interpret "lighten" to > > mean that P is the percentage of the full scale, not of the original > > color's luminance. > > > > This goes back to commit 656c2dd66e, which was supposed to fix > > bug#54514. But maybe Noah's interpretation of "lighten" was > > incorrect, and we should revert that change? OTOH, if we do revert > > it, then Noah's example will disagree with the above page. > > That change may have been made in haste. For example, it didn't touch the corresponding saturate and desaturate functions which use similar mechanics, so there is now an inconsistency in that respect. > > But which interpretation is better isn't obvious. It doesn't have much to do with colour theory per se. As luminance is already a percentage of sorts, it's not at all clear what it means by increasing it by a certain percentage. Personally I wouldn't use either function because of how ill-defined they are. Maybe there are widely-accepted de-facto standards for that? Or maybe we should support more than one interpretation, by way of some user option? From unknown Sat Sep 06 09:45:43 2025 X-Loop: help-debbugs@gnu.org Subject: bug#74055: 31.0.50; color-lighten-name not lightening black Resent-From: Gerd =?UTF-8?Q?M=C3=B6llmann?= Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Tue, 29 Oct 2024 04:44:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 74055 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: Eli Zaretskii Cc: julien@danjou.info, Mattias =?UTF-8?Q?Engdeg=C3=A5rd?= , noah@splode.com, 74055@debbugs.gnu.org Received: via spool by 74055-submit@debbugs.gnu.org id=B74055.17301769851464 (code B ref 74055); Tue, 29 Oct 2024 04:44:02 +0000 Received: (at 74055) by debbugs.gnu.org; 29 Oct 2024 04:43:05 +0000 Received: from localhost ([127.0.0.1]:55507 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1t5e4P-0000NX-9G for submit@debbugs.gnu.org; Tue, 29 Oct 2024 00:43:05 -0400 Received: from mail-wm1-f43.google.com ([209.85.128.43]:47405) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1t5e4M-0000NP-Tn for 74055@debbugs.gnu.org; Tue, 29 Oct 2024 00:43:04 -0400 Received: by mail-wm1-f43.google.com with SMTP id 5b1f17b1804b1-431481433bdso49910435e9.3 for <74055@debbugs.gnu.org>; Mon, 28 Oct 2024 21:43:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1730176922; x=1730781722; darn=debbugs.gnu.org; h=content-transfer-encoding:mime-version:user-agent:message-id:date :references:in-reply-to:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=Auf4+vvpd7xSyx8mGqK3o8YsnbubGJ9lxecgX4IHmdc=; b=kaBUQUoAElPN9Qy8JnFxVGVDd994N9p8TXq03axjNZic+6tTadxVnRGs95gB24OjHD uSDtRKbsWf133YYSkWweAXLa5V/+Xy0I4S6Xnle0/USzWW68MQ0+Mew2/pmUBUQeo/4I hM4ypZ4djTxk/66EemPzNEuFwqniUjBGH3OGivtyvd8jBteD4zKxrMaUEQiZ6euRuk6b nbDEJgYW6H0xpFCrR82WjNAT1y1TjFQL5X+3nBCRyigsS8VSwUfVSMqYZwvhqtuNBHdZ vcwB7b0eaaGsBA44C8e0zwpx8hyi5x1B7fBZN0tGgLSF/LRSE3EKyFGVwRMtRMuR5Dgx Dc2A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1730176922; x=1730781722; h=content-transfer-encoding:mime-version:user-agent:message-id:date :references:in-reply-to:subject:cc:to:from:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=Auf4+vvpd7xSyx8mGqK3o8YsnbubGJ9lxecgX4IHmdc=; b=DOyWXZoqqfJYbeeJ2NXxmIoEgos2y6L4shmbitaPxOgxiaP6d+07X5qqn78JXuY2M2 1uvqo8ViwNaKSoBLDln6Fb2BNqztaEP2x2jIG0q2ihYJR6E++bVuDwyGX0hU8CHp/cSx z+ViEk3S/+spMHKGRP88+rqCEI14aGqAKbsejm947nCCtuy7cG+y/Kn4avAY/4rVJYpt kC2wyLGULXRIhSMaXW7gDM6+hgmQn+yuz2iUdbQ94WLlBlEZ8epBMT5ffVBF5tlexrVy 5+ax9kdItQk6Q6ucxsZZgxP4hkZjhfqPU8wmX2NxrOLI7C1J/BMA5CjvlPZrdjqyf2l6 a5tQ== X-Forwarded-Encrypted: i=1; AJvYcCVcvzJ5+KMeX8MAeNR7m3bOSVwY8vuvYNmauGKYbBuqexKvfLWQe21kG+v6MCPRotS1QIZZ9Q==@debbugs.gnu.org X-Gm-Message-State: AOJu0YxSlwOaJeSKT7vaVoKf/JLOfXCMkS3BwXw4UcnzWoBufstqh/dQ qoQXoQ+/z9lYFreUSDD7E17s+93XeShp/6MRBCIEmG3YxCKcwtmT X-Google-Smtp-Source: AGHT+IH+iDuCSAFB/1TiXG3b3mDObjQ/Tf5X1VApeV21owZoCPf5p3NOPvrzMM9U9/ZEC29GzxJjzA== X-Received: by 2002:a05:600c:444b:b0:42c:a8cb:6a75 with SMTP id 5b1f17b1804b1-4319acb19a6mr106621205e9.17.1730176921860; Mon, 28 Oct 2024 21:42:01 -0700 (PDT) Received: from pro2 (p4fe3a9b1.dip0.t-ipconnect.de. [79.227.169.177]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4318b55f689sm161306075e9.16.2024.10.28.21.42.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 28 Oct 2024 21:42:01 -0700 (PDT) From: Gerd =?UTF-8?Q?M=C3=B6llmann?= In-Reply-To: <86cyjk6sz7.fsf@gnu.org> (Eli Zaretskii's message of "Mon, 28 Oct 2024 19:24:28 +0200") References: <86plnk766i.fsf@gnu.org> <86cyjk6sz7.fsf@gnu.org> Date: Tue, 29 Oct 2024 05:41:59 +0100 Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Spam-Score: 0.0 (/) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -1.0 (-) Eli Zaretskii writes: >> From: Mattias Engdeg=C3=A5rd >> Date: Mon, 28 Oct 2024 17:57:49 +0100 >> Cc: Gerd M=C3=B6llmann , >> Julien Danjou , >> 74055@debbugs.gnu.org, >> Noah Friedman >>=20 >> 28 okt. 2024 kl. 13.39 skrev Eli Zaretskii : >>=20 >> > Our notion of "lighten color" seems to be to increase the color's >> > luminance by P percent. Since the black color's luminance is zero, >> > increasing that by 50% still yields zero. >> >=20 >> > By contrast, the page you point to seems to interpret "lighten" to >> > mean that P is the percentage of the full scale, not of the original >> > color's luminance. >> >=20 >> > This goes back to commit 656c2dd66e, which was supposed to fix >> > bug#54514. But maybe Noah's interpretation of "lighten" was >> > incorrect, and we should revert that change? OTOH, if we do revert >> > it, then Noah's example will disagree with the above page. >>=20 >> That change may have been made in haste. For example, it didn't >> touch the corresponding saturate and desaturate functions which use >> similar mechanics, so there is now an inconsistency in that respect. >>=20 >> But which interpretation is better isn't obvious. It doesn't have >> much to do with colour theory per se. As luminance is already a >> percentage of sorts, it's not at all clear what it means by >> increasing it by a certain percentage. Personally I wouldn't use >> either function because of how ill-defined they are. > > Maybe there are widely-accepted de-facto standards for that? I think HSL colors (Hue Saturation Luminescence) are used by CSS for example, so that's good, and color.el has support for HSL colors. Except that something is currently not working right, I guess. From unknown Sat Sep 06 09:45:43 2025 X-Loop: help-debbugs@gnu.org Subject: bug#74055: 31.0.50; color-lighten-name not lightening black Resent-From: Gerd =?UTF-8?Q?M=C3=B6llmann?= Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Tue, 29 Oct 2024 08:27:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 74055 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: Eli Zaretskii Cc: julien@danjou.info, Mattias =?UTF-8?Q?Engdeg=C3=A5rd?= , noah@splode.com, 74055@debbugs.gnu.org Received: via spool by 74055-submit@debbugs.gnu.org id=B74055.17301904039669 (code B ref 74055); Tue, 29 Oct 2024 08:27:02 +0000 Received: (at 74055) by debbugs.gnu.org; 29 Oct 2024 08:26:43 +0000 Received: from localhost ([127.0.0.1]:55876 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1t5hYp-0002Vt-Bi for submit@debbugs.gnu.org; Tue, 29 Oct 2024 04:26:43 -0400 Received: from mail-wm1-f45.google.com ([209.85.128.45]:48623) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1t5hYm-0002Vg-7T for 74055@debbugs.gnu.org; Tue, 29 Oct 2024 04:26:42 -0400 Received: by mail-wm1-f45.google.com with SMTP id 5b1f17b1804b1-43152b79d25so47682275e9.1 for <74055@debbugs.gnu.org>; Tue, 29 Oct 2024 01:26:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1730190339; x=1730795139; darn=debbugs.gnu.org; h=content-transfer-encoding:mime-version:user-agent:message-id:date :references:in-reply-to:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=+qHTlB7NibMqhqP9UxNlqEqgji0hr9iB9KDd8oYWUG8=; b=f24vVHdK51XPh/5EFv/EYYjAA2wcFV8seoydrXtMxoRw5Bdb4OKQFp3YlgEl+CjwM2 zYX+4iJPJXN0OycrDbOajpXWN5L6CLVXSzIE3BHAjI5HJJfY6MdZsiAJm9fcWg9exjax w3jG0p3kBdhp+pL2AuhxNIOhTQhsyuAixO/iNZR9NbkMTDgL8ruiFIRdI2rYEJfpbiVN IoEVhxADspaSl6PNe+lkVNfA/OVYj/ppPvMPKr0vbWgUc+s1i1rNKf3DSKf3ZCfmF9ks 0BsYYy7BooeXqN9uC8DSZYIWMLsjqRoSFWBydROQwZbeHtiHJp5Mo3IU95X7K1u25XAZ jSEA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1730190339; x=1730795139; h=content-transfer-encoding:mime-version:user-agent:message-id:date :references:in-reply-to:subject:cc:to:from:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=+qHTlB7NibMqhqP9UxNlqEqgji0hr9iB9KDd8oYWUG8=; b=eyDPKzF0SLZTRySiMDIpjgF8QOlZLXFvzYPSlUPmZ/DBTosmPH3ZL37CRPAxuOLllW 5FyjWaob4XolRF0hizmqkG4WpC+QunxQ3yldS/P4lOuFjv1eOas1hRyAfk6g4PaXR3tU r/coFwReuOyBvsl5/6aDxMZRZTc+oswhqrGsUXSQFiFasacK87l5nhhugjEMU2jE29Kw M5Fdd3u5Koe2yTV+oT6UxvHcTc0YEmcawcRHtFbSJ7d+UQUrcNhpW+Y0I0oJuBighjhI Xy8++sUnmAxPThVymuzW4MsrgaJnf5P5hc+BvSiYj2aKcAow4xSlPHWCJLLfJ4VpmynY /WvQ== X-Forwarded-Encrypted: i=1; AJvYcCW/DK1AI1vzkhmpUyapuGK8oHtY3INcF0pH4cc+04d3jLa6BpHZECLBSK6ATBd47nBQlB0TFA==@debbugs.gnu.org X-Gm-Message-State: AOJu0YzZ6L8lR+ou7JUAolcrRTDyR85zoQ+5INKkeIsNoIWBOq9QQsaA 5jTbAjXrXTU17hFHS1/tGp71mEGHvTS9eaQaPf3BFfwbfj88ZZth X-Google-Smtp-Source: AGHT+IFfADXyIANBZ2Zk52QALkrFeLZVySHz7WWjBMfQQ9IvdDNGHVL51xdBb1aG8xu4iM5bt0/sQw== X-Received: by 2002:a05:600c:1d15:b0:431:4a83:2d80 with SMTP id 5b1f17b1804b1-4319ab94761mr93694395e9.0.1730190339244; Tue, 29 Oct 2024 01:25:39 -0700 (PDT) Received: from pro2 (p4fe3a9b1.dip0.t-ipconnect.de. [79.227.169.177]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4318b56eda3sm166812605e9.31.2024.10.29.01.25.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 29 Oct 2024 01:25:38 -0700 (PDT) From: Gerd =?UTF-8?Q?M=C3=B6llmann?= In-Reply-To: ("Gerd =?UTF-8?Q?M=C3=B6llmann?="'s message of "Tue, 29 Oct 2024 05:41:59 +0100") References: <86plnk766i.fsf@gnu.org> <86cyjk6sz7.fsf@gnu.org> Date: Tue, 29 Oct 2024 09:25:38 +0100 Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Spam-Score: 0.0 (/) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -1.0 (-) Gerd M=C3=B6llmann writes: > Eli Zaretskii writes: > >>> From: Mattias Engdeg=C3=A5rd >>> Date: Mon, 28 Oct 2024 17:57:49 +0100 >>> Cc: Gerd M=C3=B6llmann , >>> Julien Danjou , >>> 74055@debbugs.gnu.org, >>> Noah Friedman >>>=20 >>> 28 okt. 2024 kl. 13.39 skrev Eli Zaretskii : >>>=20 >>> > Our notion of "lighten color" seems to be to increase the color's >>> > luminance by P percent. Since the black color's luminance is zero, >>> > increasing that by 50% still yields zero. >>> >=20 >>> > By contrast, the page you point to seems to interpret "lighten" to >>> > mean that P is the percentage of the full scale, not of the original >>> > color's luminance. >>> >=20 >>> > This goes back to commit 656c2dd66e, which was supposed to fix >>> > bug#54514. But maybe Noah's interpretation of "lighten" was >>> > incorrect, and we should revert that change? OTOH, if we do revert >>> > it, then Noah's example will disagree with the above page. >>>=20 >>> That change may have been made in haste. For example, it didn't >>> touch the corresponding saturate and desaturate functions which use >>> similar mechanics, so there is now an inconsistency in that respect. >>>=20 >>> But which interpretation is better isn't obvious. It doesn't have >>> much to do with colour theory per se. As luminance is already a >>> percentage of sorts, it's not at all clear what it means by >>> increasing it by a certain percentage. Personally I wouldn't use >>> either function because of how ill-defined they are. >> >> Maybe there are widely-accepted de-facto standards for that? > > I think HSL colors (Hue Saturation Luminescence) are used by CSS for > example, so that's good, and color.el has support for HSL colors. Except > that something is currently not working right, I guess. TIL the L in HSL actually stands for lightness. And the math for RGB <-> HSL conversion is nicely explained here: https://www.niwa.nu/2013/05/math-behind-colorspace-conversions-rgb-hsl/ From unknown Sat Sep 06 09:45:43 2025 X-Loop: help-debbugs@gnu.org Subject: bug#74055: 31.0.50; color-lighten-name not lightening black Resent-From: Mattias =?UTF-8?Q?Engdeg=C3=A5rd?= Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Tue, 29 Oct 2024 12:56:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 74055 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: Eli Zaretskii Cc: gerd.moellmann@gmail.com, julien@danjou.info, noah@splode.com, 74055@debbugs.gnu.org Received: via spool by 74055-submit@debbugs.gnu.org id=B74055.173020655313980 (code B ref 74055); Tue, 29 Oct 2024 12:56:02 +0000 Received: (at 74055) by debbugs.gnu.org; 29 Oct 2024 12:55:53 +0000 Received: from localhost ([127.0.0.1]:56364 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1t5llI-0003dQ-Aa for submit@debbugs.gnu.org; Tue, 29 Oct 2024 08:55:52 -0400 Received: from mail-lf1-f54.google.com ([209.85.167.54]:53456) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1t5llE-0003dK-7s for 74055@debbugs.gnu.org; Tue, 29 Oct 2024 08:55:51 -0400 Received: by mail-lf1-f54.google.com with SMTP id 2adb3069b0e04-53b13ea6b78so8401431e87.2 for <74055@debbugs.gnu.org>; Tue, 29 Oct 2024 05:55:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1730206487; x=1730811287; darn=debbugs.gnu.org; h=to:references:message-id:content-transfer-encoding:cc:date :in-reply-to:from:subject:mime-version:sender:from:to:cc:subject :date:message-id:reply-to; bh=fi/OkLlbh9hwKRYWDoem+ZacUNw6bClR1IyuQk+dS54=; b=BOwASTBG+P2a5krQhNj15J709ZCZ2ulAq6Q3qm3qFnVHXm9AZ+ht6K6cdnJPWGuYHr 13C1ruCxMMfpynxVOPuU3+nDHqPuHBL8+BD6dp842PImCM6YLh6hxHLGpJxgj0Kf8cwy LO/rdPamuQ+8MBkh2QgD4JsPDefZ9b4WHF49Q0x9D9WkJn0FIs98hml5nw4VS0Eym601 gPE//43LBqy1iWXr8tnKcf7aeYPRI1qOOrZQXw7hKxj1J6GbEe5tcKXP6AuZ2Vy1RFIp s5NDoxsn3pvNQdKFIXqAEwxNpH9EZ/IvfDrVyJu/GBzNqtsumaFCj/wiIWClXuPyfsD2 t3wQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1730206487; x=1730811287; h=to:references:message-id:content-transfer-encoding:cc:date :in-reply-to:from:subject:mime-version:sender:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=fi/OkLlbh9hwKRYWDoem+ZacUNw6bClR1IyuQk+dS54=; b=CB3d+7FgxhVZfKc0Vkk3UoKJlnW5bio19ZnY2B6NrGLogoNWukCyR+gwLVEiB3EG9y j0qYgZoM5uOLMEOjpQsLk3tUAKsMMFSQs9N/sjgu6618hiNxW8ugzpnP4GnRsp76sE95 tSw2/ff7ldi9gPDjmXnTvo9Oeb/GwIYnvVxkKrG6gmUbtqVJvpb/T8qNMAZ0THtCfIwk e8NfO1+oqc3jtjwuAJwONblHOBMv8L8y9TPtcSlwOkIvByk+sVjSGrT6OrJ5Guyeye7G 80rl1OlX6UhAUQ6h8MqZMh6NyfPG1jXVSQJRp8FHX8IulVX7AXnFMrRFKy9uE1U6vhEB W7yg== X-Forwarded-Encrypted: i=1; AJvYcCXGNUmibxreQuPNO4kIMxyTYsDJ+jHWv5On2e9lP4fRkGZBzr387GE+Ms/r1GoPAO6cA/nrlQ==@debbugs.gnu.org X-Gm-Message-State: AOJu0YxHdXMUTeH0nUL1rkY2UxxDqP153rvYEXbWnwwwScjdKu6W1/Mw KQD2ImObqwiQ2tfJE0IOdBtSM6P1bmC2GVwklnFebfjRx/WsgVxi X-Google-Smtp-Source: AGHT+IFgHr88UxD4wJ/eGt4DsR/z7+gzHQPq2uiBL/vadVatYyawKETQlIrcX2ARQX/W3xiipGN5RA== X-Received: by 2002:a05:6512:3c90:b0:539:9767:903d with SMTP id 2adb3069b0e04-53b34c3fb40mr7609275e87.60.1730206486899; Tue, 29 Oct 2024 05:54:46 -0700 (PDT) Received: from smtpclient.apple (c188-150-183-180.bredband.tele2.se. [188.150.183.180]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-53b2e1c918dsm1370909e87.221.2024.10.29.05.54.45 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Tue, 29 Oct 2024 05:54:46 -0700 (PDT) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 14.0 \(3654.120.0.1.15\)) From: Mattias =?UTF-8?Q?Engdeg=C3=A5rd?= In-Reply-To: <86cyjk6sz7.fsf@gnu.org> Date: Tue, 29 Oct 2024 13:54:45 +0100 Content-Transfer-Encoding: quoted-printable Message-Id: References: <86plnk766i.fsf@gnu.org> <86cyjk6sz7.fsf@gnu.org> X-Mailer: Apple Mail (2.3654.120.0.1.15) X-Spam-Score: 0.0 (/) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -1.0 (-) 28 okt. 2024 kl. 18.24 skrev Eli Zaretskii : > Maybe there are widely-accepted de-facto standards for that? Perhaps the documentation should said 'percentage points' instead of = just 'percent' to be unambiguous, since the lightness value is relative = to the white-point. I'd say the old model (percentage points) is better because it results = in changes that are perceptually more uniform. For example, with the = current code, (color-lighten-name C 5) has much less effect when C is a dark colour than for a light one. = Therefore the change was probably a mistake in hindsight. > Or maybe we should support more than one interpretation, by way of > some user option? Don't think so -- only really a good solution for user preferences, not = for an API. From unknown Sat Sep 06 09:45:43 2025 X-Loop: help-debbugs@gnu.org Subject: bug#74055: 31.0.50; color-lighten-name not lightening black Resent-From: Gerd =?UTF-8?Q?M=C3=B6llmann?= Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Tue, 29 Oct 2024 18:29:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 74055 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: Mattias =?UTF-8?Q?Engdeg=C3=A5rd?= Cc: julien@danjou.info, Eli Zaretskii , noah@splode.com, 74055@debbugs.gnu.org Received: via spool by 74055-submit@debbugs.gnu.org id=B74055.173022650522006 (code B ref 74055); Tue, 29 Oct 2024 18:29:01 +0000 Received: (at 74055) by debbugs.gnu.org; 29 Oct 2024 18:28:25 +0000 Received: from localhost ([127.0.0.1]:57959 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1t5qx7-0005is-5K for submit@debbugs.gnu.org; Tue, 29 Oct 2024 14:28:25 -0400 Received: from mail-wr1-f52.google.com ([209.85.221.52]:44131) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1t5qx4-0005ik-9e for 74055@debbugs.gnu.org; Tue, 29 Oct 2024 14:28:23 -0400 Received: by mail-wr1-f52.google.com with SMTP id ffacd0b85a97d-37d49ffaba6so4076247f8f.0 for <74055@debbugs.gnu.org>; Tue, 29 Oct 2024 11:28:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1730226436; x=1730831236; darn=debbugs.gnu.org; h=content-transfer-encoding:mime-version:user-agent:message-id:date :references:in-reply-to:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=QmIOv1E4D3Pps099MhfTznqy2MoSjN+AuaKNolLymbY=; b=VkVeqfxQ1IeaD9nLZLfNtHaJ5PC2g3XyH6mgQfpxnhtZLGrrbbLM9y/MscDZW5cwUk gna+9hyZ4F79Z4c+39rxZhLPBYP5fwWUKbnLNDLXF6Rd3v12lJyWMpkapWdvTWuysEBv LacDRoulden7w0QD+WA6u/TLZsri2Bbd99c4adWtTPEkpT+fCut1TsRaZ4FOwERUAgtr HXxx5xLPvabHprXOkX4zPeHxPUPBf9M7rBOhpdLxQox3SZiKkJTrheWGX25+keYWhj2L 3Ct3V5b/MRexLftYMQVt67E7wDwP1f172lGKsWx2TDG1EX/JVxP483N8EWggf4KI5Wg8 1KCw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1730226436; x=1730831236; h=content-transfer-encoding:mime-version:user-agent:message-id:date :references:in-reply-to:subject:cc:to:from:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=QmIOv1E4D3Pps099MhfTznqy2MoSjN+AuaKNolLymbY=; b=D/ViniDKLXohSgkU5m5hO72idvWtrNIlCmtfdxCfbjfHaV1Lv0GoBj4MvKwws7stP9 WsXw0G2LVPj4NYivSQW9p3AaJEgf6icKcfg4moxkNqse0A9wCTGmgcLO5wn31HrPrdM6 muDRUj3zn+9hmtQax52WAQDnw2aoerCOEk4T/cvdWJKBnJYM7xYPXUZ9qTiwIvDMqi/9 cmY7StVrBegEVfz5S1rZK8LcfmXLjmU7buAu/DiLEuqGF3fu7QDGoNr+x/mFy4lPqlw7 dM3ZRc0pIqCTesuZvjJx3aUfymJPs1Py26bWPD44i/qYZ1BsSLMMGSbOyBjbEqLGPW2Q 7Frw== X-Forwarded-Encrypted: i=1; AJvYcCV4aE8Opi9HxNi/wcUzUWmzJIrnfGRmc64DSHZeSxsNKfpCe+H8Zk7jipCYIYmuS1j1GhNQEA==@debbugs.gnu.org X-Gm-Message-State: AOJu0YxRZbtqmxh6lAYQeZcnSm5ckmT9jm3B5BGGL5XKHDxV3qFEyqbq 1E+pTzJB3T7NrDbZrK8iYHrBQoE9jA3fq39PCVabHuKgJJNuXhs/ X-Google-Smtp-Source: AGHT+IFp6zdmgtTGCegczbGBaYWjqQnD4Thucg9DAvw41YhHJ/T+zx5W+tkWZFaaWXowaFNA0pbX2g== X-Received: by 2002:a5d:4d03:0:b0:37c:d225:6d33 with SMTP id ffacd0b85a97d-381b710f718mr443670f8f.55.1730226436246; Tue, 29 Oct 2024 11:27:16 -0700 (PDT) Received: from pro2 (p4fe3a9b1.dip0.t-ipconnect.de. [79.227.169.177]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-38058b1c8a9sm13304353f8f.12.2024.10.29.11.27.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 29 Oct 2024 11:27:15 -0700 (PDT) From: Gerd =?UTF-8?Q?M=C3=B6llmann?= In-Reply-To: ("Mattias =?UTF-8?Q?Engdeg=C3=A5rd?="'s message of "Tue, 29 Oct 2024 13:54:45 +0100") References: <86plnk766i.fsf@gnu.org> <86cyjk6sz7.fsf@gnu.org> Date: Tue, 29 Oct 2024 19:27:14 +0100 Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Spam-Score: 0.0 (/) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -1.0 (-) Mattias Engdeg=C3=A5rd writes: > I'd say the old model (percentage points) is better because it results > in changes that are perceptually more uniform. For example, with the > current code, > > (color-lighten-name C 5) > > has much less effect when C is a dark colour than for a light one. > Therefore the change was probably a mistake in hindsight. +1 From unknown Sat Sep 06 09:45:43 2025 X-Loop: help-debbugs@gnu.org Subject: bug#74055: 31.0.50; color-lighten-name not lightening black Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sat, 02 Nov 2024 16:21:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 74055 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: Gerd =?UTF-8?Q?M=C3=B6llmann?= Cc: julien@danjou.info, mattias.engdegard@gmail.com, noah@splode.com, 74055@debbugs.gnu.org Received: via spool by 74055-submit@debbugs.gnu.org id=B74055.173056441632589 (code B ref 74055); Sat, 02 Nov 2024 16:21:02 +0000 Received: (at 74055) by debbugs.gnu.org; 2 Nov 2024 16:20:16 +0000 Received: from localhost ([127.0.0.1]:54258 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1t7GrI-0008TJ-0C for submit@debbugs.gnu.org; Sat, 02 Nov 2024 12:20:16 -0400 Received: from eggs.gnu.org ([209.51.188.92]:53874) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1t7GrE-0008Q8-O4 for 74055@debbugs.gnu.org; Sat, 02 Nov 2024 12:20:15 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1t7Gp1-0007lZ-1m; Sat, 02 Nov 2024 12:17:55 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=MIME-version:References:Subject:In-Reply-To:To:From: Date; bh=2iup4Dp1aZNNKFJ4tP7OJ7PiGIswpJ2PM0zTAH15gZE=; b=Bsl9i/5cHQvxKtR80Vnw pUdnHm3TnUv4et4r++uVYaWxVzXQoEJMr1zY5NJXPqpRe/32FSxQir+BmxYJI19Q/hxo9lu1mVOs/ ECmMYJ+xUhZs3pQWUzkMIVLWLZjnw0LRU3384DQqihRB4BzyLf7v4osj/ntFSaQUGd33x2iJYu6wN XCdUj/5TFeo/Ez9f1GaLKs5vllsh4mc3tJFbNGhya6yDMCW2tTqTL/3VwvRQ96cSsLEjYmciQZ7cI a58n4xAgHPzEQIB3X/Knt0mcWg+rvVydmufrsT1fCNBpe6EWSRswuPIVNUnLRxy4w7niXtIKHVtDC pt7Jh73Ud6Lvrw==; Date: Sat, 02 Nov 2024 18:17:34 +0200 Message-Id: <86jzdly5i9.fsf@gnu.org> From: Eli Zaretskii In-Reply-To: (message from Gerd =?UTF-8?Q?M=C3=B6llmann?= on Tue, 29 Oct 2024 19:27:14 +0100) References: <86plnk766i.fsf@gnu.org> <86cyjk6sz7.fsf@gnu.org> MIME-version: 1.0 Content-type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Spam-Score: -2.3 (--) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -3.3 (---) > From: Gerd Möllmann > Cc: Eli Zaretskii , julien@danjou.info, > 74055@debbugs.gnu.org, noah@splode.com > Date: Tue, 29 Oct 2024 19:27:14 +0100 > > Mattias Engdegård writes: > > > I'd say the old model (percentage points) is better because it results > > in changes that are perceptually more uniform. For example, with the > > current code, > > > > (color-lighten-name C 5) > > > > has much less effect when C is a dark colour than for a light one. > > Therefore the change was probably a mistake in hindsight. > > +1 I hope I fixed that now, please take a look. Noah's original example works as expected, and the comparison with Web sites also seems to be working. From unknown Sat Sep 06 09:45:43 2025 X-Loop: help-debbugs@gnu.org Subject: bug#74055: 31.0.50; color-lighten-name not lightening black Resent-From: Gerd =?UTF-8?Q?M=C3=B6llmann?= Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sat, 02 Nov 2024 17:12:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 74055 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: Eli Zaretskii Cc: julien@danjou.info, mattias.engdegard@gmail.com, noah@splode.com, 74055@debbugs.gnu.org Received: via spool by 74055-submit@debbugs.gnu.org id=B74055.17305675216325 (code B ref 74055); Sat, 02 Nov 2024 17:12:02 +0000 Received: (at 74055) by debbugs.gnu.org; 2 Nov 2024 17:12:01 +0000 Received: from localhost ([127.0.0.1]:54502 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1t7HfN-0001dt-FB for submit@debbugs.gnu.org; Sat, 02 Nov 2024 13:12:01 -0400 Received: from mail-wr1-f51.google.com ([209.85.221.51]:43289) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1t7HfK-0001di-UJ for 74055@debbugs.gnu.org; Sat, 02 Nov 2024 13:11:59 -0400 Received: by mail-wr1-f51.google.com with SMTP id ffacd0b85a97d-37d3ecad390so2417201f8f.1 for <74055@debbugs.gnu.org>; Sat, 02 Nov 2024 10:11:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1730567453; x=1731172253; darn=debbugs.gnu.org; h=content-transfer-encoding:mime-version:user-agent:message-id:date :references:in-reply-to:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=FQQduh1z+OF+r7xTEhTeYIpJTbA5eFqvZppl+NpWHCM=; b=RokFKVDxIWQae9ObRsFKosN2p0BiEgETQVBmGV5ModCeOgrQtKCl6BOoL4PKj/XTKC QiFwjOzzVqjy/tMXGa7VwbFGsiVwWD6sjcWbwBv+z0XFnrZJM9RXVoM7VfUKV5ZGcbQZ bbZZ/ahlKHtW85eC/wFqW8i8UUY0WxaZN3nDOCpOpokO7IxG6nkEeC12bmzilwYqcxrn lejd95JZDKvEGJN1t1LtECNadCbmlYugrJItJM+vd6enyuZx8O/DOdsOAm1fTr+mbz4s LptDD24rP1MCR8uOYSupn4jzYkOSm6y1e5VjMF6JZWmXe7XvJ6ibKJHZr4hjjJol24Jh qq8Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1730567453; x=1731172253; h=content-transfer-encoding:mime-version:user-agent:message-id:date :references:in-reply-to:subject:cc:to:from:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=FQQduh1z+OF+r7xTEhTeYIpJTbA5eFqvZppl+NpWHCM=; b=xHXH8CVNEPfIB+LchevS9pecaD6rltn5z0iw0ZCiGkaKkfodX/qeNYbtmL8L/EW11W HrElXfcByw3WWaeLoo0RQA7rzg4wHPTOk4tmfXHzICK107l19CzqoQrVE0ljt72Unmoe pbaM2OKQKEgMKhuMkugwjIkil595aXogFBFMh1CKo1w6lYFyUnJrmYqtnlyouP7Vjuro Y6dT75Uy0QlVUbrVWloQkrhGm5wEYvPvbEgwhjMm7A4LDA+f1q7GUqW4zGEMCK473fqb WbJrm5h1h9xW2dNfdrZvtr2hd8FKAFBz/ItO2P5zsRUa1uAwdrPmX6u/XJ5n/8+JVGIx NvKw== X-Forwarded-Encrypted: i=1; AJvYcCUk/LCBWqNaKy5J/Xzldu7UshTfY4Ynb8yDAm0fMV7pJSw7hW80s3elbcJBJdJPtP6hwibFRA==@debbugs.gnu.org X-Gm-Message-State: AOJu0Yw7EFvDMw+QPVQetLm/rtSj9LBH6DwwxgofRU109GDrPFW+U3U8 CpjDkp8mKsmb1Phf6yfxYbbZxqwuP3UJfOmMphOVQg2PdJ5Ngmz5 X-Google-Smtp-Source: AGHT+IF3hgCTJcu0+2Gu7jImXMBSG6RudZZsowHvYjtUmKKpKtZpfi2DUb/E6JVhQ8WuRFySWvKEAA== X-Received: by 2002:a5d:47c5:0:b0:37c:cc7c:761c with SMTP id ffacd0b85a97d-381c130731fmr8233106f8f.3.1730567452955; Sat, 02 Nov 2024 10:10:52 -0700 (PDT) Received: from pro2 (p4fe3a3af.dip0.t-ipconnect.de. [79.227.163.175]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-381c116ad90sm8581766f8f.99.2024.11.02.10.10.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 02 Nov 2024 10:10:52 -0700 (PDT) From: Gerd =?UTF-8?Q?M=C3=B6llmann?= In-Reply-To: <86jzdly5i9.fsf@gnu.org> (Eli Zaretskii's message of "Sat, 02 Nov 2024 18:17:34 +0200") References: <86plnk766i.fsf@gnu.org> <86cyjk6sz7.fsf@gnu.org> <86jzdly5i9.fsf@gnu.org> Date: Sat, 02 Nov 2024 18:10:51 +0100 Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Spam-Score: 0.0 (/) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -1.0 (-) Eli Zaretskii writes: >> From: Gerd M=C3=B6llmann >> Cc: Eli Zaretskii , julien@danjou.info, >> 74055@debbugs.gnu.org, noah@splode.com >> Date: Tue, 29 Oct 2024 19:27:14 +0100 >>=20 >> Mattias Engdeg=C3=A5rd writes: >>=20 >> > I'd say the old model (percentage points) is better because it results >> > in changes that are perceptually more uniform. For example, with the >> > current code, >> > >> > (color-lighten-name C 5) >> > >> > has much less effect when C is a dark colour than for a light one. >> > Therefore the change was probably a mistake in hindsight. >>=20 >> +1 > > I hope I fixed that now, please take a look. > > Noah's original example works as expected, and the comparison with Web > sites also seems to be working. Works for me, too. Thanks! From unknown Sat Sep 06 09:45:43 2025 X-Loop: help-debbugs@gnu.org Subject: bug#74055: 31.0.50; color-lighten-name not lightening black Resent-From: Gerd =?UTF-8?Q?M=C3=B6llmann?= Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Mon, 04 Nov 2024 12:37:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 74055 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: Eli Zaretskii Cc: julien@danjou.info, mattias.engdegard@gmail.com, noah@splode.com, 74055@debbugs.gnu.org Received: via spool by 74055-submit@debbugs.gnu.org id=B74055.17307238094388 (code B ref 74055); Mon, 04 Nov 2024 12:37:01 +0000 Received: (at 74055) by debbugs.gnu.org; 4 Nov 2024 12:36:49 +0000 Received: from localhost ([127.0.0.1]:39585 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1t7wK8-00018i-NE for submit@debbugs.gnu.org; Mon, 04 Nov 2024 07:36:49 -0500 Received: from mail-wr1-f52.google.com ([209.85.221.52]:53320) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1t7wK5-00018a-IV for 74055@debbugs.gnu.org; Mon, 04 Nov 2024 07:36:47 -0500 Received: by mail-wr1-f52.google.com with SMTP id ffacd0b85a97d-37d4ac91d97so3575123f8f.2 for <74055@debbugs.gnu.org>; Mon, 04 Nov 2024 04:36:45 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1730723739; x=1731328539; darn=debbugs.gnu.org; h=content-transfer-encoding:mime-version:user-agent:message-id:date :references:in-reply-to:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=R0CP3/11C+/Lo0oy9zOMXjQhsvUZeq0NpvpX1BviLgc=; b=ASPUjGUNhKj0mlvA/eEGqxS9Skmm21BRweFKL1LpIlfyX8rMb495siXDQQuxESpcL4 pjGST7hh/D+8hEGAwcuqKPD1jIJjdCiBgAYrqa0MX4yk5Ry3A83ckd5B2Z1yRRkiF971 wqyt3uE7f65keQgNb20XmINgIXGzZEGoyYrnPyXVA8KZj575mwUJxGtSlvH1MrGwx9IN JxtdSAei989yiUAwS4bNQwzU4k5SVSZ5JT2K2QU/7tztusyP4zO2LrPxo5ZuuXlRaLYr 4DaxViz+HYmPBmiUHxhf0jJvvWU41u64vJEg53b/2hhs6Fd0lpE5K23KlZmgRFWlEyUn lpmg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1730723739; x=1731328539; h=content-transfer-encoding:mime-version:user-agent:message-id:date :references:in-reply-to:subject:cc:to:from:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=R0CP3/11C+/Lo0oy9zOMXjQhsvUZeq0NpvpX1BviLgc=; b=m/1k/iZ5UX7FvMuWx0RVR8FYDSNcQmgEuQNlGShzN4T4usGZ2VTRRosjSuMLJ7zDL/ g8Miw1qIsfAdG2y8WuHD53rLV6TW57ezMI4WLK6cALsZ1GBGkhP79Q6+GZjJ5mIP02lJ dqU+4Gr94djsNcafVJnSKSs5idlPu+R9gW92iTtDA2c/STtE8x1E2vPGWg+yCp1/ycc2 vqsn960QD7kYwUjzijzWxp0dOptIeHggDV7mj/2hwx81aKP4D52F9Jk+pWRWB/b+O0zY qx23OqOCI0BjszolG80vz3XKmSmd1n+XgbnSZp8/ChrUzuN4doFCW3bljiHTHZF4ELdV IDLA== X-Forwarded-Encrypted: i=1; AJvYcCX++/g1ylv/mNQcbSQb7HwklxWoS5wLKtAmGd9mq/Iids9x6ZouuxFdyoe3W6TfRz0CcjULng==@debbugs.gnu.org X-Gm-Message-State: AOJu0YxeB8ekYdXHWWjAhIHOzT8ocYTlBHVeQXeKnHNfk0Vtye5O+cSw Eg8qk3eroCDk4ol0JBEM3XkHvlzMOajI3JSlLnCp4JTRogshBLyrDn87/w== X-Google-Smtp-Source: AGHT+IEFIplH95osO9K+Xsw8cPmyK6X/DbJ5vPXdGQ0tQGNcOL+wF7PVuLTK/gFuORbdKe/xtxP/nQ== X-Received: by 2002:a5d:6d0f:0:b0:37d:9565:4db2 with SMTP id ffacd0b85a97d-381c7a469cemr14114287f8f.6.1730723739112; Mon, 04 Nov 2024 04:35:39 -0800 (PST) Received: from pro2 (p4fe3a1e0.dip0.t-ipconnect.de. [79.227.161.224]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-381c10b7b80sm13296900f8f.10.2024.11.04.04.35.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 04 Nov 2024 04:35:38 -0800 (PST) From: Gerd =?UTF-8?Q?M=C3=B6llmann?= In-Reply-To: ("Gerd =?UTF-8?Q?M=C3=B6llmann?="'s message of "Sat, 02 Nov 2024 18:10:51 +0100") References: <86plnk766i.fsf@gnu.org> <86cyjk6sz7.fsf@gnu.org> <86jzdly5i9.fsf@gnu.org> Date: Mon, 04 Nov 2024 13:35:37 +0100 Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Spam-Score: 0.0 (/) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -1.0 (-) Gerd M=C3=B6llmann writes: > Eli Zaretskii writes: > >>> From: Gerd M=C3=B6llmann >>> Cc: Eli Zaretskii , julien@danjou.info, >>> 74055@debbugs.gnu.org, noah@splode.com >>> Date: Tue, 29 Oct 2024 19:27:14 +0100 >>>=20 >>> Mattias Engdeg=C3=A5rd writes: >>>=20 >>> > I'd say the old model (percentage points) is better because it results >>> > in changes that are perceptually more uniform. For example, with the >>> > current code, >>> > >>> > (color-lighten-name C 5) >>> > >>> > has much less effect when C is a dark colour than for a light one. >>> > Therefore the change was probably a mistake in hindsight. >>>=20 >>> +1 >> >> I hope I fixed that now, please take a look. >> >> Noah's original example works as expected, and the comparison with Web >> sites also seems to be working. > > Works for me, too. Thanks! Guess I can close this now. 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[79.227.161.224]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4327d698055sm153386755e9.40.2024.11.04.04.36.22 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 04 Nov 2024 04:36:22 -0800 (PST) Date: Mon, 04 Nov 2024 13:36:21 +0100 Message-Id: To: control@debbugs.gnu.org From: =?utf-8?Q?Gerd_M=C3=B6llmann?= Subject: control message for bug #74055 MIME-version: 1.0 Content-type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Spam-Score: 2.0 (++) X-Spam-Report: Spam detection software, running on the system "debbugs.gnu.org", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: close 74055 31.1 quit Content analysis details: (2.0 points, 10.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 RCVD_IN_VALIDITY_SAFE_BLOCKED RBL: ADMINISTRATOR NOTICE: The query to Validity was blocked. See https://knowledge.validity.com/hc/en-us/articles/20961730681243 for more information. [209.85.128.53 listed in sa-trusted.bondedsender.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (gerd.moellmann[at]gmail.com) -0.0 SPF_PASS SPF: sender matches SPF record 0.0 RCVD_IN_VALIDITY_RPBL_BLOCKED RBL: ADMINISTRATOR NOTICE: The query to Validity was blocked. See https://knowledge.validity.com/hc/en-us/articles/20961730681243 for more information. [209.85.128.53 listed in bl.score.senderscore.com] -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [209.85.128.53 listed in list.dnswl.org] -0.0 RCVD_IN_MSPIKE_H2 RBL: Average reputation (+2) [209.85.128.53 listed in wl.mailspike.net] 2.0 MALFORMED_FREEMAIL Bad headers on message from free email service X-Debbugs-Envelope-To: control X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: 1.0 (+) close 74055 31.1 quit From unknown Sat Sep 06 09:45:43 2025 X-Loop: help-debbugs@gnu.org Subject: bug#74055: 31.0.50; color-lighten-name not lightening black Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Mon, 04 Nov 2024 13:32:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 74055 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: Gerd =?UTF-8?Q?M=C3=B6llmann?= Cc: julien@danjou.info, mattias.engdegard@gmail.com, noah@splode.com, 74055@debbugs.gnu.org Received: via spool by 74055-submit@debbugs.gnu.org id=B74055.173072711711624 (code B ref 74055); Mon, 04 Nov 2024 13:32:02 +0000 Received: (at 74055) by debbugs.gnu.org; 4 Nov 2024 13:31:57 +0000 Received: from localhost ([127.0.0.1]:39964 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1t7xBU-00031Q-Ie for submit@debbugs.gnu.org; Mon, 04 Nov 2024 08:31:56 -0500 Received: from eggs.gnu.org ([209.51.188.92]:33158) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1t7xBS-00031I-Fq for 74055@debbugs.gnu.org; Mon, 04 Nov 2024 08:31:55 -0500 Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1t7xBD-0001Ij-4M; Mon, 04 Nov 2024 08:31:48 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=MIME-version:References:Subject:In-Reply-To:To:From: Date; bh=5g385X4zOM6sHkl9+lL/B81XkDBpSLH8jS6tgIN/hv0=; b=oKhPoXOSgwSAUlwQdtOG wj1F/2wOn9DdlH9xNzcs/rfCAtcJjUjcTrJ/28cpxb/nPTYHyWraNXuWkBRA/fujKsHorwgx1232T eY42wHiASMXWdGbdh0KzTmTfxmujhu75nLHPOMnDDCjRwGBS4ahZyJTOTI1g9xlbmbDdulXFqftxy 1PazOjODYvwJzcajxSGoavy5SiFeVNitortDRa0DmBbMUNcbIarHkfUBAZzvvt6E9Wpit3NfyS64F H2yKRBWwLqAWkHipcPjiQdpK0Ike8xI+0dPzWCsKKbvjXGWs6I5KJ4yRnzqZarmBxH+Mv503mN8/2 E8PKLvaTYHiqJQ==; Date: Mon, 04 Nov 2024 15:31:35 +0200 Message-Id: <86cyjbunuw.fsf@gnu.org> From: Eli Zaretskii In-Reply-To: (message from Gerd =?UTF-8?Q?M=C3=B6llmann?= on Mon, 04 Nov 2024 13:35:37 +0100) References: <86plnk766i.fsf@gnu.org> <86cyjk6sz7.fsf@gnu.org> <86jzdly5i9.fsf@gnu.org> MIME-version: 1.0 Content-type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Spam-Score: -2.3 (--) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -3.3 (---) > From: Gerd Möllmann > Cc: julien@danjou.info, mattias.engdegard@gmail.com, noah@splode.com, > 74055@debbugs.gnu.org > Date: Mon, 04 Nov 2024 13:35:37 +0100 > > Gerd Möllmann writes: > > >> I hope I fixed that now, please take a look. > >> > >> Noah's original example works as expected, and the comparison with Web > >> sites also seems to be working. > > > > Works for me, too. Thanks! > > Guess I can close this now. Please do, and thanks.