# [APCA color contrast guidelines promoted to stable](https://developer.chrome.com/blog/new-in-devtools-149#apca)

Published: Wed, Jul 15, 2026
Source: [developer.chrome.com](https://developer.chrome.com/blog/new-in-devtools-149#apca)

> The Advanced Perceptual Contrast Algorithm (APCA) contrast calculator has officially left its experimental phase and is now available as a standard preference setting. APCA replaces the legacy AAA/AA contrast guidelines with a modern perceptual contrast model optimized for modern displays and text rendering.