What are OKLCH colors?

September 8, 2025

Chromaticity diagram showing the visible color spectrum with three nested white triangles representing different color gamuts within the RGB color space.

OKLCH is a newer color model that is designed to be perceptually uniform. This means that colors are much more accurate in terms of how humans perceive them and it makes working with them much easier.

Source: What are OKLCH colors?

We’ve been coming some of the new colour spaces in particular OKLCH here at Conffab for a while. You can find a number of videos on these new CSS colour features, and we’ve linked to quite a few articles along these lines in recent months.
This one is a particularly detailed look at the OKLC-H colour space in particular.