Color Contrast Checker - WCAG Compliance
Ensure your website is accessible to everyone. Our free Color Contrast Checker instantly verifies your UI colors against WCAG standards locally in your browser.
What is the Color Contrast Checker?
Web accessibility isn't just good practice; in many regions, it's legally required. The Web Content Accessibility Guidelines (WCAG) mandate specific contrast ratios between text and background colors to ensure users with visual impairments can read your content. This interactive checker allows you to test your brand colors instantly. By inputting two HEX codes, it calculates the exact mathematical ratio (e.g., 4.5:1) and tells you if you pass AA or AAA compliance. Because UI design palettes are proprietary, the mathematics are processed entirely client-side without uploading your colors to a server.
Why Use Our Color Contrast Checker?
- WCAG Compliance: Instantly grades your colors for AA (Standard) and AAA (Enhanced) readability.
- Visual Preview: See exactly how the text will look on the background.
- Total Privacy: Your brand palettes are analyzed locally on your device.
- Instant Feedback: The score updates in real-time as you tweak the HEX codes.
How to Use the Color Contrast Checker
Enter the HEX code for your Text Color (Foreground).
Enter the HEX code for your Background Color.
Review the visual preview to check aesthetics.
Analyze the Pass/Fail badges for WCAG AA and AAA standards.
Frequently Asked Questions
For WCAG AA compliance, normal text must have a ratio of at least 4.5:1. Large text (over 18pt) requires a ratio of 3:1.
Currently, the tool accepts standard 6-digit HEX codes (e.g., #FFFFFF), which are the industry standard for UI design handoffs.
No, all ratio calculations happen securely in your local browser.
All file processing is performed locally in your web browser. We do not upload, store, or view your data.