Color Contrast Checker
Color Contrast Checker
Free online color contrast checker. Calculate contrast ratio between background and text colors, evaluate WCAG AA/AAA compliance, and preview results in real time. All processing runs locally in the browser.
Preview
Normal Text (16px)
Large Text (24px)
Contrast Ratio
21 : 1
Background Luminance
1.0000
Text Luminance
0.0000
WCAG Compliance
AA Normal Text
≥ 4.5 : 1
PassAA Large Text
≥ 3 : 1
PassAAA Normal Text
≥ 7 : 1
PassAAA Large Text
≥ 4.5 : 1
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