Color Contrast Checker
Check the contrast ratio between text and background against WCAG AA and AAA.
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contrast ratio
AA
Normal text —
Large text —
AAA
Normal text —
Large text —
Large heading sample
The quick brown fox jumps over the lazy dog — this is normal body text at a small size.
About this tool
Free online colour contrast checker
The Ajenza Colour Contrast Checker computes the WCAG contrast ratio between a text colour and a background colour and tells you whether it passes AA and AAA for normal and large text. AA requires 4.5:1 for normal text and 3:1 for large; AAA requires 7:1 and 4.5:1. Use the pickers or type any hex value and see a live preview update instantly. It all runs in your browser — nothing is uploaded.
Frequently asked questions
Is it free?
Yes — completely free, with no sign-up, download or watermark.
What is "large" text?
At least 24px, or 18.66px if bold.
Is anything uploaded?
No — everything runs in your browser.
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