Some time ago I started Krita and I had the thought: well we can do better. The window decoration is just looking out of place. Everything is a nice dark color, but the window decoration isn’t. So I asked a few people what they think about making it better and the reaction was overall very positive and I started to investigate.
Right now I have a solution for KWin/5 which allows the window decoration to follow the color scheme of the window. Have a video:
At the moment it’s implemented mostly inside Oxygen, but I intend to move most of it to KColorScheme an KStyle directly, so that any KDE/Qt application can benefit from this new feature.
And of course I need to point out that all of that is possible without opening Pandora’s box of Client Side Window Decorations as Aaron said today.