I love breeze-dark.  There are difficulties with some non-KDE apps, especially firefox, but also some other apps where you get stuff like dark blue links on a gray background, but that's not what this bug is about.

One usability issue I have with breeze-dark is that my eye doesn't always see the boundary of a window, if I have two windows overlapping.  With the title bar the same color as the backgrounds, one window blends into another visually.  If I have overlapping windows, I want to be able to see that, oh, that bit is actually from another window.

IDK if it's possible to choose a window border color that isn't ugly, but isn't quite the same as the backgrounds.

One change I made in System Settings -> Colors -> Colors is:
Active Titlebar: a dark red (#630000)
Inactive Titlebar: a very dark red (#280000)

I use a solid dark blue desktop background (#004), and the gray, dark blue, and dark red actually look ok.  The red for active titlebars is bolder than the rest of the color scheme, but I don't find it garish.  White text in titlebars is easily readable against the dark red.

I also use the "Dim Inactive" desktop effect, with strength 10.  I use "disable compositing for fullscreen windows" so it doesn't affect mpv playing fullscreen video on one monitor, while the focus is on something else.  This effect makes inactive titlebars even dimmer, which isn't really needed, but it's ok.

I might turn off that effect now that I've changed the default titlebar colors to something that makes it easier to tell which window has the keyboard focus.  (I use focus follows mouse.)  IIRC, lack of difference between active/inactive windows was another weak point of the default breeze-dark theme.

IDK if this is the right place for UI-design feedback like this;  sorry if it isn't!


Reproducible: Always