Using Ubuntu 16.04, KDE Plasma 5, when looking at the "System Settings" -> "Appearance" group I have the selections of ...
- "Workspace Theme"
- "Application Style"
When I navigate to "Workspace Theme" I see ...
- "Look And Feel"
- "Desktop Theme"
- "Cursor Theme"
- "Splash Screen"
I have downloaded a theme using "Application Style" -> "Window Decorations", but I do not see it in "Workspace Theme", nor do I see it in "Workspace Theme"->"Desktop Theme". I do see it in "Application Style".
When I navigate to "Color" I only see the themes I see in "Workspace Theme"->"Desktop Theme" and I can edit and create my own version. But since I cannot see themes I downloaded in "Application Style" I cannot edit my selected theme.
I would like to tweak the theme to have a different color for the active window title bar so it stands out more. Specifically I would like the active window title bar to be say bright blue, and the inactive title bars to be say grey, both with white lettering. In one of my screen shots I can see this applied in a customized version of "Breeze" so I know its a configuration thing.
The multiple "Theme" categories implemented by Ubuntu team and KDE team have me really confused about the proper approach. What is the best way to simply tweak the theme? I don't know if this is a KDE thing, an Ubuntu thing, or a GTK thing.