# APCA Contrast

Canonical URL: https://colorcurio.us/library/apca-contrast
Source type: Library entry
Resource URL: https://apcacontrast.com/
Added: 2026-09-22

## Summary

APCA’s perceptual lightness-contrast score, proposed as a replacement for the WCAG 2 ratio.

Useful for seeing where the WCAG 2 ratio overrates dark pairs. It is not yet a compliance standard, so audits still need the old number.

- Resource: [APCA Contrast](https://apcacontrast.com/)
- By: Andrew Somers
- Kind: accessibility (tool)
- Level: intermediate
- Tags: accessibility, perception, designer, developer, interactive, web

## In collections

- [Colorblind-Safe Workflows](https://colorcurio.us/library/collections/colorblind-safe-workflows)

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