Color Contrast Checker

Check color contrast ratios against WCAG accessibility standards.

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Color Contrast Checker

Check color contrast ratios against WCAG accessibility standards.

What is a Color Contrast Checker?

This tool measures the contrast ratio between a text color and a background color and tells you whether it meets the Web Content Accessibility Guidelines (WCAG). Sufficient contrast ensures text is readable for people with low vision or color blindness.

Features

• Calculates the exact WCAG contrast ratio • Pass/fail results for AA and AAA levels • Separate checks for normal and large text • Live preview of your chosen colors • Accepts 3- or 6-digit hex colors

How to Use

1. Choose or type your text color 2. Choose or type your background color 3. Read the contrast ratio and pass/fail badges 4. Adjust until you meet the level you need

Frequently Asked Questions

What contrast ratio do I need?

WCAG AA requires 4.5:1 for normal text and 3:1 for large text. AAA requires 7:1 and 4.5:1 respectively.

What counts as large text?

Roughly 18pt (24px) regular, or 14pt (18.66px) bold and larger.

Last updated: 2026-06-09

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