Enter two colors to check their contrast ratio and accessibility rating. Uses the official WCAG 2.1 contrast formula.
Preview Text
The quick brown fox jumps over the lazy dog. 1234567890
Contrast Ratio: 0:1
Fail (Poor contrast)
The Color Contrast Checker helps you test color combinations for accessibility compliance. It calculates contrast ratios using the official WCAG 2.1 algorithm and shows whether your text and background colors pass AA or AAA standards.
This tool works entirely in your browser, so you can experiment freely with colors and instantly verify readability and compliance.