What does a color contrast checker do?

A color contrast checker compares foreground and background colors to calculate contrast ratio and determine whether they meet accessibility standards such as WCAG.

Why should frontend developers check color contrast?

Checking color contrast helps frontend developers build interfaces that are easier to read and more accessible to a wider range of users.

Color Contrast Checker

Check color contrast ratio between foreground and background colors, review WCAG pass and fail states, and preview readability instantly.

This free color contrast checker helps frontend developers and designers test whether text and interface colors are readable enough for real users.

Use it to compare foreground and background colors, validate WCAG contrast requirements, and refine UI palettes for accessibility.

Colors

Foreground

Background

Contrast Result

17.74:1

Frontend developers use contrast checks to keep interfaces readable.

WCAG Ratings

AA Normal Text

Pass

AA Large Text

Pass

AAA Normal Text

Pass

AAA Large Text

Pass

Contrast Tips

Short comparisons and tips to help you choose the right option faster.

AA vs AAA contrast

AA is the more common accessibility target for most interfaces. AAA is stricter and can be useful for text-heavy experiences or higher accessibility standards.

Why contrast matters

Strong contrast improves readability, reduces eye strain, and helps more users successfully use text, buttons, and interface elements across devices and lighting conditions.

How to Use

Follow these quick steps to get the result you need.

Choose a foreground color and a background color using the pickers or HEX inputs.

Review the live contrast ratio and the WCAG pass or fail results for normal and large text.

Adjust or swap the colors until the sample text and ratings match the accessibility target you need.