GNU bug report logs - #61188
30.0.50; color-lighten-name seems not to work

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Package: emacs;

Reported by: "Mark Bestley" <gnu <at> bestley.co.uk>

Date: Mon, 30 Jan 2023 21:49:02 UTC

Severity: normal

Found in version 30.0.50

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From: Bernd Rellermeyer <bernd.rellermeyer <at> t-online.de>
To: 61188 <at> debbugs.gnu.org
Subject: bug#61188: 30.0.50; color-lighten-name seems not to work
Date: Tue, 21 Feb 2023 14:08:29 +0100

I am not happy with the new implementation of color-lighten-hsl. I think the old implementation was correc. In my opinion there is a misunderstanding about the argument percent. The value L itself is a percentage, ranging from 0.0 to 1.0, and the argument percent is a percentage point to add to the percentage L (divided by 100). E.g. if L is 0.5 and percent is 10, the result should be 0.6 and not 0.5 * 1.1 = 0.55. In the case of the black color, the result should be 0.0 + 0.1 = 0.1. That is because percent is a percentage point and not a percentage.

I would suggest to switch back to the old implementation.
This bug report was last modified 2 years and 120 days ago.

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