Color Contrast Checker
100% Client-SideVerify color contrast ratios between text and backgrounds against official WCAG 2.1 AA and AAA accessibility compliance standards in real time.
Accessible Typography Preview
Good contrast ensures your content is clearly readable for users with visual impairments, aging eyes, or when browsing on screens in direct sunlight.
How to Use Color Contrast Checker
Select or enter the HEX color for your typography.
Select or enter the HEX color for the background container.
Inspect contrast score (e.g. 7.5:1) and pass/fail ratings for normal, large text, and UI components.
Key Features & Privacy
Immediate evaluation for small body text (4.5:1), large text (3:1), and high AAA threshold (7:1).
Preview regular paragraph text, bold headers, and button badges in chosen colors.
Mathematical relative luminance calculations per W3C specification.
This tool runs entirely in your local browser runtime. No logs, analytics tracking, or remote server transmissions occur.
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