WCAG Contrast Calculator
Calculate contrast ratio between text and background to test compliance. Fast, free, and fully client-side.
Preview Title Text
This is a sample of small copy text designed to check readability and visual contrast ratios. If the text blends too much with the background, it will fail AA or AAA guidelines.
Contrast Ratio1.00 : 1
WCAG 2.1 Compliance
Normal Text (< 18pt)
❌ AA Fail(req. 4.5:1)
❌ AAA Fail(req. 7.0:1)
Large Text (> 18pt)
❌ AA Fail(req. 3.0:1)
❌ AAA Fail(req. 4.5:1)