wcag criterion
1.4.3 Contrast (Minimum)
WCAG 2.2 Success Criterion 1.4.3 Contrast (Minimum) at Level AA requires text and images of text to have a contrast ratio of at least 4.5:1 against their background, with large-scale text (18 point or 14 point bold) requiring 3:1; the WCAG 2.2 sister criterion 1.4.11 Non-text Contrast covers UI components and graphical objects at 3:1.
About 1.4.3 Contrast (Minimum)
Calculated via the WCAG luminance formula. Many design systems fail this on subtle gray-on-white body text. Tools: WebAIM Contrast Checker, axe DevTools, manual check.
Where 1.4.3 Contrast (Minimum) appears in a AccessivePath audit
Our AI auditors test concepts like 1.4.3 Contrast (Minimum) as part of the WCAG 2.2 Level AA audit cycle — both via automated rule scanning and through screen-reader simulation and human pair review.
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