Color Contrast Checker
Check the WCAG contrast ratio between text and background colors and see if it passes AA/AAA.
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Accessible text needs enough contrast against its background. The WCAG standard asks for a ratio of at least 4.5:1 for normal text and 3:1 for large text (AA), with stricter 7:1 / 4.5:1 thresholds for AAA. This checker computes the exact ratio and shows pass/fail for each level, with a live sample.