Color Contrast Checker
Check WCAG AA and AAA contrast ratios between foreground and background colors.
Runs entirely in your browser - your files are never uploaded
What is Color Contrast Checker?
Color Contrast Checker is a free, web-based utility designed for instant, local accessibility tools tasks. It allows users to compute, format, convert, or edit data directly in their browser without installing software or registering an account.
- 100% Free & Unlimited Usage
- 0% File Uploads (100% Client-Side Privacy)
- Instant Real-Time Calculations
- Mobile, Tablet & Desktop Compatible
How to use Color Contrast Checker
Select or Enter Input
Provide your source file or type your values into Color Contrast Checker.
Configure Settings
Adjust parameters, formatting options, or units in real-time.
Get Instant Output
Download the final processed file or copy the generated output.
About the Color Contrast Checker
Ensuring sufficient text contrast is vital for readability and accessibility compliance. The Color Contrast Checker measures luminance ratios against WCAG 2.1 guidelines.
Check compliance for small text, large text, and UI components across AA (4.5:1 / 3:1) and AAA (7:1 / 4.5:1) standards with live previews and color blindness filters.
Frequently asked questions
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