color
Color
Hex, RGB, HSL and OKLCH side by side, with out-of-gamut values flagged.
Lightness ramp
OKLCH is perceptually uniform: changing L by the same amount looks like the same change in brightness at any hue, which HSL emphatically does not do. That is why the ramp above is generated in OKLCH: the steps look even rather than bunching in the yellows.