WCAG Contrast Checker
Test foreground and background color combinations against WCAG 2.1 AA and AAA standards.
Sample Text Preview (17.85:1)
The quick brown fox jumps over the lazy dog. Ensure readability across all screens and lighting environments.
Overview
Ensure your website is accessible to everyone. Calculate contrast ratios for normal and large text, see live previews, and check pass/fail badges for WCAG AA and AAA compliance.
WCAG Color Contrast Checker: Accessibility Compliance
The Contrast Checker calculates luminance contrast ratios between foreground text and background colors against WCAG 2.1 Level AA and AAA criteria.
How to Check WCAG Contrast Compliance
Fast & IntuitiveSet Foreground Hex
Input the text color value.
Set Background Hex
Input the container background color.
Review Score
Evaluate Pass/Fail badges for normal and large body typography.
Key Highlights & Advantages
Zero server uploads. Everything processes securely within your local browser memory.
Immediate results with no file upload or download queues.
No registration, no paywalls, and no hidden quotas.
Seamlessly optimized for mobile smartphones, tablets, and desktop workstations.
All data processing runs natively via W3C compliant browser hardware acceleration.
- Passing WCAG AAA (7:1 ratio) guarantees supreme legibility under outdoor sunlight glare.
Frequently Asked Questions
1 Q&AsWhat is the minimum passing WCAG AA contrast ratio?
At least 4.5:1 for standard body copy, and 3.0:1 for large display headers.