APCA Contrast Checker — Compare with WCAG 2
See the APCA Lc score and the WCAG 2 contrast ratio for the same colors, side by side, and find out where the two methods disagree.
Preview
Headline 32px bold
Body text 18px regular. The quick brown fox jumps over the lazy dog.
Light 16px weight 300 needs more contrast.
Small 14px regular text for captions.
Tiny 12px bold label
WCAG 2 contrast ratio
0: 1
APCA lightness contrast
0Lc
Side-by-side results
APCA levels follow the commonly published Lc guidance (body text 75+, preferred 90, large and bold text lower). Sizes and weights are simplified guidance, not a substitute for the full APCA font lookup table.
How both methods react on this background
WCAG 2 ratio (÷21)
APCA |Lc| (÷106)
Your text color (as a gray of equal luminance)
Dashed lines mark WCAG 4.5:1 and APCA Lc 75. Notice how WCAG gives the same credit to very dark and very light text near mid-tones, while APCA is polarity-aware: it rewards dark text on light backgrounds differently from light text on dark ones.
Try pairs where the two methods differ
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