Color Contrast Ratio Checker: Test WCAG Compliance Instantly
How to check color contrast ratios for WCAG compliance. Step-by-step guide to using a contrast checker to audit text and background pairs.
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Tags: accessibility, color, developer-tools
Color Contrast Ratio Checker: Test Foreground vs Background Color contrast checking is a routine part of accessible design — it's quick, objective, and prevents one of the most common accessibility failures on the web. A contrast checker takes two colors as input and tells you whether their pairing passes WCAG standards for text readability. Here's how to use one effectively and how to apply the results to your design process. What a Contrast Ratio Checker Does A contrast checker: Takes a foreground color (text color) and a background color Calculates the relative luminance of each Computes the contrast ratio as where L1 is the lighter luminance Reports the ratio and shows WCAG AA and AAA pass/fail status for normal and large text The output is a single number — the ratio — and a clear…
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