Hi, When using misterioso theme, and semantic sticky-function-mode is enabled, it is hard to see the function name under the header-line. The header-line face could probably be darker. How to reproduce: Put these settings in your emacs init file: (require 'semantic) (add-hook 'prog-mode-hook 'semantic-mode) (semantic-mode 1) (setq semantic-default-submodes '(global-semantic-stickyfunc-mode)) (load-theme 'misterioso t) Then open a C file to see the header-line enabled. In GNU Emacs 27.0.50 (build 9, x86_64-pc-linux-gnu, GTK+ Version 3.18.9) of 2018-10-15 built on elxa1qhzn12 Repository revision: 6b8fd34c4ab1aa23b180440cdc8210900896bbf4 Windowing system distributor 'The X.Org Foundation', version 11.0.11804000 System Description: Ubuntu 16.04.5 LTS Recent messages: For information about GNU Emacs and the GNU system, type C-h C-a. Parsing composite.c (LL)...done Configured features: XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GPM DBUS GSETTINGS GLIB NOTIFY ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB TOOLKIT_SCROLL_BARS GTK3 X11 XDBE XIM THREADS LCMS2 GMP Important settings: value of $LANG: sv_SE.UTF-8 value of $XMODIFIERS: locale-coding-system: utf-8-unix Major mode: C/*l Minor modes in effect: diff-auto-refine-mode: t global-semanticdb-minor-mode: t global-semantic-idle-scheduler-mode: t semantic-idle-scheduler-mode: t semantic-stickyfunc-mode: t global-semantic-stickyfunc-mode: t semantic-mode: t tooltip-mode: t global-eldoc-mode: t electric-indent-mode: t mouse-wheel-mode: t tool-bar-mode: t menu-bar-mode: t file-name-shadow-mode: t global-font-lock-mode: t font-lock-mode: t blink-cursor-mode: t auto-composition-mode: t auto-encryption-mode: t auto-compression-mode: t line-number-mode: t transient-mark-mode: t abbrev-mode: t Load-path shadows: None found. Features: (shadow sort mail-extr emacsbug message rmc puny dired dired-loaddefs format-spec rfc822 mml mml-sec password-cache epa derived epg epg-config gnus-util rmail rmail-loaddefs time-date mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums mm-util mail-prsvr mail-utils vc-git diff-mode easy-mmode semantic/db-file data-debug ring cedet-files semantic/bovine/c semantic/decorate/include semantic/decorate/mode semantic/decorate pulse hideif semantic/bovine/c-by semantic/lex-spp semantic/bovine/gcc semantic/dep semantic/bovine semantic/analyze/refs semantic/db-find semantic/db-ref semantic/analyze semantic/sort semantic/scope semantic/analyze/fcn cc-mode cc-fonts cc-guess cc-menus cc-cmds cc-styles cc-align cc-engine cc-vars cc-defs misterioso-theme semantic/db-mode semantic/db eieio-base cl-seq seq semantic/idle semantic/format ezimage semantic/tag-ls semantic/find semantic/ctxt semantic/util-modes easymenu semantic/util semantic semantic/tag semantic/lex semantic/fw eieio byte-opt bytecomp byte-compile cconv eieio-core cl-macs gv eieio-loaddefs cl-loaddefs cl-lib mode-local find-func cedet elec-pair mule-util tooltip eldoc electric uniquify ediff-hook vc-hooks lisp-float-type mwheel term/x-win x-win term/common-win x-dnd tool-bar dnd fontset image regexp-opt fringe tabulated-list replace newcomment text-mode elisp-mode lisp-mode prog-mode register page menu-bar rfn-eshadow isearch timer select scroll-bar mouse jit-lock font-lock syntax facemenu font-core term/tty-colors frame cl-generic cham georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao korean japanese eucjp-ms cp51932 hebrew greek romanian slovak czech european ethiopic indian cyrillic chinese composite charscript charprop case-table epa-hook jka-cmpr-hook help simple abbrev obarray minibuffer cl-preloaded nadvice loaddefs button faces cus-face macroexp files text-properties overlay sha1 md5 base64 format env code-pages mule custom widget hashtable-print-readable backquote threads dbusbind inotify lcms2 dynamic-setting system-font-setting font-render-setting move-toolbar gtk x-toolkit x multi-tty make-network-process emacs) Memory information: ((conses 16 405054 13457) (symbols 48 27400 1) (strings 32 90364 2450) (string-bytes 1 3562252) (vectors 16 34925) (vector-slots 8 672405 21560) (floats 8 54 207) (intervals 56 862 38) (buffers 992 12) (heap 1024 62517 1812))