Color Contrast Checker
Check the contrast ratio between text and background colors against WCAG AA and AAA accessibility standards, with a live preview.
| Standard | Normal text | Large text |
|---|---|---|
| WCAG AA | — | — |
| WCAG AAA | — | — |
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How to use
Pick a text color and a background color. The contrast ratio and pass/fail for each WCAG level update live, with a preview.
FAQ
What can I use Color Contrast Checker for?
Color Contrast Checker is useful when you need to check the contrast ratio between text and background colors against WCAG AA and AAA accessibility standards, with a live preview. It is meant for quick checks, everyday workflows and practical tasks where a fast browser-based result is enough.
How do I use Color Contrast Checker correctly?
Paste the number, ID, code or value exactly as you want it checked. Keep meaningful letters and digits, but remove accidental extra characters unless the page says they are allowed.
What input does Color Contrast Checker need?
Use the fields shown in the tool and keep the input close to the real case you want to solve. If the page includes examples or presets, start with those to understand the expected format.
What result does Color Contrast Checker give me?
The tool returns a pass/fail result, detected type and a short explanation of the rule or checksum that was checked. In most cases the output updates instantly and can be copied, downloaded or used as a reference for your next step.
How accurate is Color Contrast Checker?
The check is based on public format rules, checksum math or pattern validation. A valid result does not prove the number, account, document or identifier exists in a real database.
Is my data uploaded when I use Color Contrast Checker?
The tool is designed to run in your browser, so ordinary inputs are processed locally unless a page explicitly states that it needs an online lookup.
What common mistakes should I avoid with Color Contrast Checker?
Avoid pasting hidden spaces, missing check digits, wrong country prefixes, or example values that are not meant to represent real records.
What related tasks can Color Contrast Checker help with?
Color Contrast Checker is intended for use cases related to "color contrast checker" and nearby needs such as "wcag contrast". For best results, follow the labels, examples and options on the page.
What are the limits of Color Contrast Checker?
It checks the public structure of the value, not private databases. Passing validation does not confirm ownership, balance, identity or real-world status.
When should I double-check the output from Color Contrast Checker?
Double-check the output before relying on it for access control, compliance, payments, identity checks or production security.