Design

Color Contrast Checker

Use a color contrast checker to test foreground and background pairs for WCAG readability and accessibility.

Choose your colors

Test foreground and background pairs for readable text, accessibility checks, and UI review.

Foreground

Background

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Contrast preview

Use the live preview to check whether body copy, headings, and call-to-action text stay readable.

Contrast ratio: 16.35:1
Result: Excellent
Normal text: AA pass
Large text: AA pass

Current contrast result: 16.35:1. Overall rating: Excellent.

Preview sample

Accessible design starts with readable color pairs.

Check buttons, cards, forms, and body copy before the palette moves into production.

Normal text AA: Pass
Normal text AAA: Pass

Large text AA: Pass
Large text AAA: Pass

Why use a color contrast checker

A color contrast checker helps you evaluate whether text and background colors are readable enough for real interfaces. It is especially useful when you already have a palette and need to confirm which color pairs are strong enough for headings, body text, buttons, or badges.

That makes the page a natural companion to a color palette generator because generating colors is only part of the job. A contrast checker helps decide whether those colors can actually work in production UI.

WCAG contrast checks for normal text and large text

A good contrast checker should show more than a single ratio. This page also reports whether the selected pair passes common WCAG AA and AAA thresholds for both standard-sized text and larger text treatments.

That is helpful when a color pair is acceptable for a large heading but not strong enough for paragraph copy or small labels.

Common contrast checker use cases

Teams use a contrast checker when reviewing design tokens, refining button styles, checking hero sections, validating error colors, and testing brand palettes against accessibility goals. It is also useful during QA when someone needs to confirm whether a visual change reduced readability.

Because the preview updates immediately, the tool supports fast iteration without leaving the browser or opening a design app.

FAQ

What does a color contrast checker measure?

A color contrast checker measures the luminance contrast between foreground and background colors and compares the result against WCAG thresholds.

Does this help with accessibility checks?

Yes. The tool shows whether the chosen colors pass common WCAG AA and AAA targets for normal text and large text.

Can I test brand colors before using them in UI?

Yes. It is useful for evaluating hero text, button labels, navigation links, and design system color pairs before they ship.