# CSS Color Module Level 4

Canonical URL: https://colorcurio.us/library/w3c-css-color-4
Source type: Library entry
Resource URL: https://www.w3.org/TR/css-color-4/
Added: 2026-09-22

## Summary

The CSS Color 4 spec that added oklch(), lab(), and color() for wide-gamut spaces.

- Resource: [CSS Color Module Level 4](https://www.w3.org/TR/css-color-4/)
- By: Tab Atkins Jr., Chris Lilley & Lea Verou
- Kind: references (article)
- Level: intermediate
- Tags: color-spaces, gamut, oklab, cielab, developer, spec, css

## In collections

- [The OKLCh Ecosystem](https://colorcurio.us/library/collections/oklch-ecosystem)

[Back to the library](https://colorcurio.us/library)