Color Contrast Checker

Check text and background colors against WCAG AA and AAA contrast thresholds.

Text color

Background color

Readable text previewThe quick brown fox jumps over the lazy dog.

Processing your file right in your browser

Working…

How to use the Color Contrast Checker

Simple, free and instant - no sign-up required.

Paste or type the content you want to work with.

Use the available controls to check the result the way you need it.

Run the tool and review the output on the page.

Copy or download the result when it is ready.

Practical tips for getting the best result from this tool.

Useful information about Color Contrast Checker.

Which WCAG contrast thresholds are checked?

The result covers AA and AAA thresholds for normal and large text using the standard relative-luminance contrast formula.

What ratio does normal text need for WCAG AA?

Normal text needs at least 4.5:1 for AA. Large text needs at least 3:1.

Are the selected colors sent anywhere?

No. The calculation and preview run entirely in your browser.

Color Contrast Checker - EveryFileTool