Bug 456887

SUMMARY
I love the new ability in Plasma 5.25.3 to colorize either just the titlebar or the titlebar and toolbar together using accent color. However there's a limitation I noticed while setting up the color schemes to use it: The choice between the two depends on a hidden option in the color scheme which isn't visible in the scheme editor.

STEPS TO REPRODUCE
Easiest way I found: Copy both the Breeze Light and Breeze Classic color schemes that come by default, then in both enable the "apply accent color to (in)active window titlebars" option.

OBSERVED RESULT
You should notice that both themes tint the titlebar, but only the one copied from Breeze Light will also tint the toolbar. If you dig through the settings, you won't find any option that makes it be one or the other. I even looked at the scheme in a text editor and couldn't find exactly what determines it.

EXPECTED RESULT
There should be something that can be changed in the color scheme editor which lets you decide.

IDEA AND SUGGESTION
Considering another issue is you can't make a color scheme that tints the titlebar without enabling accent colors, maybe it would be a good idea to make tinting the titlebar an explicit option as well. A new scheme option "use titlebar color in toolbar" should suffice: This way you can also use it without accent colors and apply the color scheme's titlebar color to the toolbar even when the accent color is disabled.

SOFTWARE/OS VERSIONS
Operating System: Manjaro Linux
KDE Plasma Version: 5.25.3
KDE Frameworks Version: 5.96.0
Qt Version: 5.15.5
Kernel Version: 5.18.12-3-MANJARO (64-bit)
Graphics Platform: X11
Processors: 16 × AMD Ryzen 7 3700X 8-Core Processor
Memory: 31.3 GiB of RAM
Graphics Processor: AMD Radeon RX 570 Series