Color Contrast Checker
Check the contrast ratio between two colors against WCAG 2.1 accessibility standards. Get instant pass/fail results for AA and AAA compliance.
Contrast Ratio
21.00:1
WCAG 2.1 Results
Normal Text
(< 18pt / < 14pt bold)
Requires 4.5:1
Requires 7:1
Large Text
(>= 18pt / >= 14pt bold)
Requires 3:1
Requires 4.5:1
UI Components
(Icons, borders, inputs)
Requires 3:1
Live Preview
Heading Text Sample
This is how your body text will look with the selected foreground and background colors. Check readability at different sizes.
Small text (12px) — check this carefully for accessibility.
How It Works
Choose your colors
Use the color pickers or type hex values for foreground and background colors.
Check the ratio
See the contrast ratio and WCAG AA/AAA pass/fail results instantly.
Adjust for compliance
Tweak colors until you meet WCAG requirements for your target level.
Why Color Contrast Matters for Accessibility
Color contrast is a key accessibility requirement. WCAG 2.1 Level AA requires a minimum contrast ratio of 4.5:1 for normal text and 3:1 for large text (18pt+ or 14pt+ bold). Level AAA is stricter, requiring 7:1 for normal text.
Poor contrast makes content unreadable for people with low vision, color blindness, or those viewing screens in bright environments. About 1 in 12 men and 1 in 200 women have some form of color vision deficiency.
How the color contrast checker works
Enter a URL or text. Get instant analysis with actionable insights.
Enter your URL or content
Provide the input for the color contrast checker. Our tool analyzes it using proven SEO and technical standards.
Instant analysis
The color contrast checker processes your input and delivers a detailed breakdown of issues and recommendations.
Fix issues and improve
Follow the specific recommendations to improve your scores. Re-run the check after making changes to verify improvements.
Frequently asked questions
Common questions about the color contrast checker.
What is Color Contrast Checker?
Color Contrast Checker is a free tool that helps you check wcag aa/aaa compliance of foreground/background color combinations. real-time contrast ratio, pass/fail indicators for text and ui components.
Is this tool really free?
Yes, Color Contrast Checker is 100% free to use. No signup required for most features. You can use it as many times as you need.
How does this tool work?
Simply enter your information in the form, click the action button, and get your results instantly. The tool processes your request and returns useful data or generated content.
Can I use this for commercial purposes?
Yes, you can use the output from Color Contrast Checker for commercial projects, personal websites, and business purposes without restrictions.
Do I need to create an account?
No account or signup needed. Color Contrast Checker works instantly in your browser. For advanced features and unlimited usage, consider upgrading to RobotSpeed.
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