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Color Contrast Checker
Calculate contrast ratio and check WCAG text thresholds.
Your data stays in your browser and is not sent to a server.
How to use Color Contrast Checker
Enter your values in the fields above. Results are calculated in your browser as you type or when you select Process. Use Reset to clear the inputs and start again.
About Color Contrast Checker
Calculate contrast ratio and check WCAG text thresholds. This free browser-based tool is designed for quick, private everyday use. Your input is processed on this page.
Frequently asked questions
What does Color Contrast Checkerdo?
Calculate contrast ratio and check WCAG text thresholds.
Color Contrast Checker private to use?
This page processes your input in your browser. Input is not sent to an external processing service.