Color Contrast Checker

Color Contrast Checker online — free

Check WCAG contrast ratio between two colours. Tentaco Color Contrast Checker: review input and get an instant result — free, no sign-up.

Use the tool

Full tool — runs in your browser. No sign-up required.

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What does Color Contrast Checker do?

Color Contrast Checker provides the function described in the intro directly in your browser — no installer.

Is data sent to a server?

No. Color Contrast Checker processes the standard mode locally in your browser; Tentaco does not receive your input for that path.

Do I need an account?

No. Open Color Contrast Checker and start immediately.

Does this replace professional advice?

No. Color Contrast Checker is a technical helper and does not replace legal, tax or professional advice.