While it's quiet, something to mull over
There should be SIX different colour selectors for Customize/Toolbars/Label Colour
- Light Mode Icon (SVG) colour
- Light Mode button label colour
- Light Mode menu text colour
- Dark Mode Icon (SVG) colour
- Dark Mode button label colour
- Dark Mode menu text colour
At the moment you are expecting the user to be an expert/professional colorist to balance all these colours and homogonize them into one global colour.
A better solution would be a simple, small (less than 1GB) custom trained model to balance all these colours using a 'one-click' solution - what A.I. is for (amongst many other uses)