APCA Contrast Checker
APCA L_c contrast — the WCAG 3 draft contrast algorithm.
Sample text on background
104.3
APCA L_c
Fine print, AAA-equivalent
Recommendation
About this tool
APCA models perceived contrast better than WCAG 2's static 4.5:1 ratio, especially for dark mode and very large text. Returns a signed L_c value; 60+ recommended for body text, 75+ for fine print, 90+ for AAA-equivalent.