Free WCAG Contrast Checker Online
Check color contrast ratios and ensure your designs meet WCAG accessibility standards. Test foreground and background color combinations for AA and AAA compliance.
Contrast Canvas
WCAG 2.1 contrast checker for accessible color combinations.
17.40:1
Excellent
Extremely high contrast, very accessible.
The quick brown fox jumps over the lazy dog
This is normal body text at 16px. WCAG requires at least 4.5:1 contrast ratio for AA compliance.
This is small text (14px). For AA, large text (≥18px or 14px bold) needs only 3:1 contrast.
AA Normal text (4.5:1)
Passes (≥ 4.5)
AA Large text (3:1)
Passes (≥ 3.0)
AAA Normal text (7:1)
Passes (≥ 7.0)
AAA Large text (4.5:1)
Passes (≥ 4.5)
What Is Contrast Checker?
Contrast Checker is an accessibility tool that evaluates the contrast ratio between foreground and background colors. It helps ensure your design meets WCAG (Web Content Accessibility Guidelines) standards for readability.
How To Use This Contrast Checker
- Select a foreground (text) color
- Select a background color
- View the contrast ratio instantly
- Check WCAG AA and AAA compliance
- Test for normal and large text
- Adjust colors to meet standards
Key Features
- Real-time contrast ratio calculation
- WCAG 2.1 AA and AAA compliance checking
- Normal and large text testing
- Color picker with HEX, RGB, HSL
- Pass/fail indicators
- Suggestions for improvement
- Color swap function
Who Can Use This Tool?
- Web designers ensuring accessibility
- Developers building inclusive websites
- UI/UX designers creating accessible interfaces
- Compliance officers auditing websites
- Content creators improving readability
Common Use Cases
- Website accessibility compliance
- Mobile app design
- Document and presentation design
- Brand color accessibility testing
- UI component validation
- Government and educational sites
- Inclusive design projects
Frequently Asked Questions
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