Color Contrast Checker
Revision: April 15, 2026 • Verify accessible color contrast
Check accessibility contrast ratios
Enter foreground and background colors to measure their contrast ratio. The tool shows whether the combination meets WCAG AA and AAA standards for normal and large text.
Contrast results
🚀 Quick Examples
💡 Use Cases
Web Design
Validate website text colors meet WCAG AA/AAA standards for accessibility compliance before launch.
Mobile Apps
Ensure app UI text contrasts properly across light and dark themes for mobile users.
Accessibility Audits
Test existing sites for contrast ratio violations and identify colors needing adjustment.
Branding Materials
Validate brand color combinations ensure readability in printed and digital marketing content.
✓ Best Practices
Aim for AAA Compliance
Meet 7:1 contrast ratio for large text and higher—the highest accessibility standard for inclusive design.
Test Real Content
Verify contrast with actual body copy sizes and link colors, not just theoretical color pairs.
Consider Colorblind Users
Don't rely solely on color to convey information; pair with icons, text labels, or patterns.
Test Light and Dark Modes
Validate contrast ratios in both light and dark theme variants to ensure consistency.
Check Before Launch
Run contrast checks as part of QA/launch checklist to catch accessibility issues early.
🔗 Related Utilities
🔒 Why This Tool Works in Your Browser
Accessibility checking evaluates color combinations to ensure compliance with WCAG standards—a purely computational task requiring no external data. Browser-based checking means design file samples and accessibility requirements never leave your workstation, protecting proprietary UI designs, branding specifications, and accessibility strategies from exposure. Many professionals work on confidential projects, medical interfaces, or financial applications where design mockups are sensitive intellectual property. Cloud-based contrast checkers create records of every color combination you test, potentially exposing your design direction, brand palette evolution, or accessibility priorities to service providers. Local processing in your browser eliminates this exposure entirely. The calculation algorithms are deterministic and don't benefit from cloud infrastructure—they run instantly on your device using standard color space mathematics. This means you maintain complete design confidentiality, can test unlimited color combinations without audit trails, and never compromise on accessibility for the sake of vendor independence. Your design sovereignty remains intact while ensuring accessible, standards-compliant interfaces.