# What Is Color Contrast?

Last updated: 2026-09-30

Page version: [Color contrast](https://accesserty.com/en/glossary/color-contrast/)

Contrast affects whether text, errors, and interface states can be distinguished. WCAG 2.2 AA generally requires 4.5:1 for text, or 3:1 for large text. Non-text information needed to identify controls and states is assessed separately under 1.4.11. Do not communicate meaning only through color.

Genuinely inactive controls have contrast exceptions; a pale disabled button is not automatically a failure. Placeholders and operable gray text are not exempt for that reason. Helping people understand why a control is unavailable remains useful design advice.

For sizing, measurement, exceptions, and re-testing, see [Color contrast checks before release](https://accesserty.com/en/guides/color-contrast-checks-before-release/).

References: [W3C Contrast (Minimum)](https://www.w3.org/WAI/WCAG22/Understanding/contrast-minimum.html), [Non-text Contrast](https://www.w3.org/WAI/WCAG22/Understanding/non-text-contrast.html), [Use of Color](https://www.w3.org/WAI/WCAG22/Understanding/use-of-color.html).