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Verify that your color combinations meet the Web Content Accessibility Guidelines (WCAG). Ensure your interfaces are readable and inclusive for everyone.
This preview helps you visualize how users will experience this color combination in production environments.
WCAG 2.1 Standard: For standard text, a contrast ratio of at least 4.5:1 is required (AA). For large text (18pt or 14pt bold) and graphical elements, 3:1 is sufficient. AAA rating requires 7:1 for normal text.
Every tool runs entirely in your browser. Nothing you type is uploaded, stored, or logged on our servers.
The Color Contrast Checker helps you test color combinations for accessibility compliance. It calculates contrast ratios using the official WCAG 2.1 algorithm and shows whether your text and background colors pass AA or AAA standards.
This tool works entirely in your browser, so you can experiment freely with colors and instantly verify readability and compliance.
It measures the contrast ratio between a text color and a background color and tells you whether it meets WCAG accessibility thresholds.
No. Contrast ratios are calculated client-side in your browser, so nothing you enter is uploaded.
WCAG AA requires at least 4.5:1 for normal text and 3:1 for large text, while AAA requires 7:1 and 4.5:1 respectively.
Large text is generally 18pt (about 24px) or 14pt bold (about 19px) and above, which is allowed a lower contrast threshold.
Sufficient contrast keeps text readable for users with low vision or color deficiencies and is a core requirement of accessible design.