Colour Contrast Checker
Check the contrast ratio between two colours against WCAG AA and AAA accessibility standards for text readability.
Sample text preview
Frequently Asked Questions
Is the Colour Contrast Checker really free?
Yes — unlimited use, no signup, no credit card. We built these tools to help you audit sites without paying for a data subscription.
Does this tool store or share the URLs I check?
No. Each check runs live and we don't save your input. We keep a short-lived rate-limit counter (by IP) purely to prevent abuse; it is not linked to your results.
How accurate are the results?
This tool reads live, public data directly from the page or domain you enter — it does not rely on a paid third-party database, so it reflects exactly what is publicly visible right now.
Related SEO Guides
Need help improving your search rankings?
Get a professional, country-targeted backlink campaign built for your goals.