Colour Converter & Contrast Checker
betaConvert a colour between every common notation including OKLCH, and check the contrast ratio between two colours against the WCAG AA and AAA thresholds. Luminance is computed the way the spec defines it, so the ratios match what an accessibility audit will report.
Runs in your browser · nothing uploaded·Free, no signup
FAQ
Is Colour Converter & Contrast Checker free?
Yes. Colour Converter & Contrast Checker is completely free and runs entirely in your browser. No account required.
Does Colour Converter & Contrast Checker send my data anywhere?
No. All processing happens locally in your browser. Nothing is uploaded to a server.
