Contrast Checker

Compute the contrast ratio between text and background colors and check WCAG AA/AAA compliance.

Text
Background

Large text preview Aa

This is how normal-size body text looks with this color combination.

Contrast ratio15.60 : 1
AA normal textPass (4.5:1)
AA large textPass (3:1)
AAA normal textPass (7:1)
AAA large textPass (4.5:1)

How to use

  1. Pick the tool you want to use.
  2. Enter your input or adjust the options.
  3. Copy or download the result.

FAQ

Is it free to use?

Yes. All features are free with no usage limits, and no account is required.

Is my input sent to a server?

No. Everything runs locally in your browser — your data never leaves your device.

Does it work on smartphones?

Yes. It works on both desktop and mobile with modern browsers such as Chrome, Edge, Firefox and Safari.