Conversion & UX
Color Contrast Checker
Check color combinations for WCAG 2.1 accessibility compliance.
Sample Text
This is how your text will look with these colors.
Contrast Ratio
21.00:1
AA Small Text
PASS
AA Large Text
PASS
AAA Small Text
PASS
AAA Large Text
PASS
What is the Color Contrast Checker?
Check foreground and background color combinations against WCAG 2.1 accessibility standards.
The Color Contrast Checker calculates the contrast ratio between any two colors and evaluates compliance with WCAG 2.1 AA and AAA accessibility standards. Accessible design isn't optional - it's required by law in many jurisdictions and improves usability for all visitors. Poor contrast is one of the most common accessibility failures, affecting readability for the 300 million people worldwide with color vision deficiency.
Key Benefits
Legal Compliance
Meet ADA, EAA, and WCAG requirements for digital accessibility.
Better Readability
High contrast improves reading speed and comprehension for everyone.
Inclusive Design
Serve users with low vision and color blindness effectively.
SEO Signal
Google considers page experience, and accessibility is part of UX quality.
How to Use This Tool
Enter or pick your foreground (text) color
Enter or pick your background color
Review the contrast ratio and WCAG compliance levels
Adjust colors until you achieve at least AA compliance (4.5:1)
Test with your actual font sizes - large text has relaxed requirements (3:1)
Common Use Cases
- Marketers testing CTA variations for landing pages
- Designers checking color accessibility compliance
- Developers optimizing page speed performance
- Growth teams planning A/B test experiments
- UX researchers improving user experience
Pro Tips
- Action-oriented CTAs outperform generic 'Click Here' text
- Aim for WCAG AA compliance (4.5:1 contrast ratio)
- Run A/B tests for at least 2 weeks for statistical validity
Who Uses This Tool
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Try itFrequently Asked Questions
What is the Color Contrast Checker?+
The Color Contrast Checker is a free online tool that helps you check color combinations for wcag 2.1 accessibility compliance. No signup or download required.
Is the Color Contrast Checker free?+
Yes, completely free with unlimited usage. No account needed.
How accurate is this tool?+
Our Color Contrast Checker uses industry-standard algorithms and best practices to deliver reliable results for SEO professionals and marketers.
Can I use this tool on mobile?+
Yes, the Color Contrast Checker is fully responsive and works on all devices including smartphones, tablets, and desktops.
Do you store my data?+
No. All processing happens in your browser. We never store, transmit, or share any content you input into our tools.
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