WCAG 2 vs APCA Comparisons (Visual Examples)

[Myndex]

WCAG 2 vs APCA Comparison Examples

A lot has been made of the idea that WCAG 2 "helps people with Color Vision Deficiency". However this is not demonstratively true as we can see by these simulations. In fact, WCAG 2 creates situations that are harmful especially to protanopia.

APCA clearly provides more accurate and useable guidance, and by a wide margin — and by wide, I mean that WCAG 2 incorrectly passes colors by as much as Lc 30. WCAG 2 incorrectly fails color pairs by as much as Lc 15 or even more.

Examples of WCAG 2 incorrect passes of unreadable content

Processed to simulate various CVD types.

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Examples of WCAG 2 incorrect fails of content that should pass

Processed to simulate various CVD types.

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