SUMMARY

This is more an accessibility thing, but when using picking accent color from wallpaper setting, the accent color should also take the window background color into account. Like mentioned here, there should be 4.5:1 ratio between foreground and background color for accessibility reasons: https://randoma11y.com/

Of course, there will always be color combinations that just do not work. But keeping good contrast between accent and background color should help a lot. At the very least, it would keep items readable even if the accent color is not desirable.

https://randoma11y.com/?color=%23202020 For example, this gray is my background color. The color picking method should use that background color and calculate a proper accent color that keeps a good contrast between background and foreground.

No idea if something like this is already in the works so here's my system information.

SOFTWARE/OS VERSIONS
Operating System: Fedora Linux 37
KDE Plasma Version: 5.26.4
KDE Frameworks Version: 5.101.0
Qt Version: 5.15.7
Kernel Version: 6.0.15-300.fc37.x86_64 (64-bit)
Graphics Platform: Wayland
Processors: 12 × AMD Ryzen 5 3600 6-Core Processor
Memory: 15,5 GiB of RAM
Graphics Processor: AMD Radeon RX 6600

I could also look into this. :)