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Skip to contentCheck WCAG contrast ratio between two colours. Tentaco Color Contrast Checker: review input and get an instant result — free, no sign-up.
Full tool — runs in your browser. No sign-up required.
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Test the contrast ratio between a text and background colour against WCAG AA and AAA thresholds, with a live preview. Essential for accessible, readable interfaces.
Paste or enter your input into Tentaco Color Contrast Checker. Standard processing runs locally in your browser — contents are not sent to Tentaco servers for that path.
The primary button opens the matching studio mode so you can start without an account. People often search for: color contrast, wcag contrast, accessibility.
Open Color Contrast Checker via the studio button (direct mode).
Paste or type your input.
Adjust options and review the preview or output.
Copy or save the result and re-run if needed.
Transfer to Tentaco: No for the standard mode. Processing: local in the browser. Permanent storage: only if you copy or save the result yourself.
LocalThis tool processes data locally in your browser. Tentaco does not receive your file contents for this mode.
Color Contrast Checker provides the function described in the intro directly in your browser — no installer.
No. Color Contrast Checker processes the standard mode locally in your browser; Tentaco does not receive your input for that path.
No. Open Color Contrast Checker and start immediately.
No. Color Contrast Checker is a technical helper and does not replace legal, tax or professional advice.
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