Icon backgrouds in dark theme are too bright

[Xanderath]

Icons and text on selected options are unreadable on windows

[EarnestAl]

So I guess you are on Windows 11. You could try using one of the high contrast themes like AquaticDusk or Night Sky, see comment 22 in
Bug 152534 - Win11 dark theme support–Active selections have light blue background which makes white icons and text almost invisible