Add const fn Color::hue, Color::saturation and Color::lightness etc #7746
Description
What problem does this solve or what need does it fill?
When working with color palettes, you often want to match the hue/saturation/lightness of existing colors.
Matching these directly is a bit frustrating: there's no easy way to check "what hue is this".
What solution would you like?
Add methods that parallel Color::r for all other provided color spaces.
What alternative(s) have you considered?
You can work around this by storing a const DARK_MODE_BACKGROUND_HUE etc and using that repeatedly.