SUMMARY In the Breeze Light and Breeze Dark theme, the "Inactive Titlebar Text" color is not respected. The title text of inactive windows stays the same color as the title text of active window while it's not how it is defined in the theme. This does not affect Breeze Classic. See https://imgur.com/a/rj9AvBS for screenshots. STEPS TO REPRODUCE 1. Use either Breeze Light or Breeze Dark color scheme for Plasma. 2. Have a first window opened. 3. Focus a second window. OBSERVED RESULT The titlebar text of the first window stayed the same color as in active window. EXPECTED RESULT The titlebar text of the first window changes of color for the "Inactive Titlebar Text" color defined by the selected theme. SOFTWARE/OS VERSIONS Linux/KDE Plasma: Debian 12 (Linux 6.1.0-7-amd64) (available in About System) KDE Plasma Version: 5.27.3 KDE Frameworks Version: 5.103.0 Qt Version: 5.15.8 ADDITIONAL INFORMATION I'm using X11.
Worth noting: I've been pointed to this similar bug report: But I'm not sure that's the entire story. Breeze Light does define an inactive text color for headers (see this screenshot: https://i.imgur.com/iG3jE9z.png), and it isn't applied either.
(In reply to Pablo from comment #1) > Worth noting: I've been pointed to this similar bug report: > > But I'm not sure that's the entire story. Breeze Light does define an > inactive text color for headers (see this screenshot: > https://i.imgur.com/iG3jE9z.png), and it isn't applied either. Sorry the link to the other bug is missing and I cannot edit my previous message: https://bugs.kde.org/show_bug.cgi?id=433059
Breeze Light and Breeze Dark both have Header colors in them. When a color scheme has Header colors in it, its Titlebar active/inactive colors are ignored, and the Header colors are used to create a unified look for the window's entire header area. If you don't like this, you have three options: 1. Switch to a color scheme that does not have Header colors (e.g. the old Breeze color scheme, which is still shipped) 2. Remove the Header colors from your current color scheme 3. Create the desired appearance using the Header colors of your current color scheme, by adjusting the Normal/Inactive background colors in the Header section of the color scheme editor If you want to use option #2, I'm afraid the procedure is rather annoying since we were have not yet made it possible via the GUI to remove header colors. Sorry about that. To do this manually, you will need to save a copy of the color scheme, open it at ~/.local/share/color-schemes/[the color scheme] and remove the "Header" sections, then switch to another color scheme in the Colors KCM and back to your now-header-less custom color scheme. *** This bug has been marked as a duplicate of bug 433059 ***
And if you're seeing that editing the inactive colors of a header-color-using color scheme isn't working, that would be a separate bug and needs its own new bug report
Ah it's actually also a known issue: Bug 446584.