Color Contrast Checker
Free online tool for checking color contrast ratios and ensuring web accessibility standards. Perfect for designers and developers.
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Free Online Color Contrast Checker
Our color contrast checker is a powerful online tool that helps ensure your web designs meet accessibility standards. Check contrast ratios instantly and validate WCAG compliance.
Key Features
- ✓ Real-time contrast ratio calculation
- ✓ WCAG 2.1 compliance checking
- ✓ Support for multiple color formats
- ✓ Visual preview with different text sizes
- ✓ Eyedropper tool for color picking
Supported Formats
- • HEX colors (#FFFFFF)
- • RGB values (rgb(255, 255, 255))
- • RGBA with opacity
- • HSL color space
- • Named colors (white, black, etc.)
How to Use
- 1. Enter your text color (foreground)
- 2. Enter your background color
- 3. View the contrast ratio result
- 4. Check WCAG compliance indicators
- 5. Adjust colors if needed
Chrome Extension for Quick Checks
Our Chrome extension brings the power of contrast checking directly to your browser. Check any website's color contrast with a single click.
Extension Features
- • Instant color picking from any webpage
- • Automatic contrast calculation
- • WCAG compliance checking
- • Color suggestions for better contrast
Installation Steps
- 1. Visit Chrome Web Store
- 2. Search for "Color Contrast Checker"
- 3. Click "Add to Chrome"
- 4. Start checking contrast instantly
Web Accessibility Guidelines
Understanding color contrast accessibility is crucial for creating inclusive web designs that comply with WCAG standards and ADA requirements.
WCAG Compliance Levels
Level AA (Minimum)
- • Normal text: 4.5:1 ratio
- • Large text: 3:1 ratio
- • UI components: 3:1 ratio
Level AAA (Enhanced)
- • Normal text: 7:1 ratio
- • Large text: 4.5:1 ratio
- • UI components: 3:1 ratio
Best Practices
- • Test contrast in different lighting conditions
- • Consider color blindness and visual impairments
- • Use sufficient contrast for all interactive elements
- • Don't rely solely on color to convey information
- • Test with real users and accessibility tools
Common Accessibility Issues
What to Avoid
- ✗ Low contrast text on light backgrounds
- ✗ White text on bright colors
- ✗ Text over busy images
- ✗ Gray on gray combinations
Recommended Solutions
- ✓ Use dark text on light backgrounds
- ✓ Add text shadow or overlay for image text
- ✓ Maintain minimum contrast ratios
- ✓ Test with accessibility tools
Advanced Features and Tools
Eyedropper Tool
- • Pick colors from any screen area
- • Real-time color preview
- • Multiple format support
- • Color history tracking
Opacity Handling
- • RGBA color support
- • Transparency calculations
- • Background blending
- • Alpha channel preview
Batch Analysis
- • Multiple color pair testing
- • Bulk contrast checking
- • Report generation
- • CSV export support
Developer Tools
API Access
- • RESTful API endpoints
- • JSON response format
- • Rate limiting options
- • Authentication support
Integration Options
- • NPM package available
- • WebSocket real-time updates
- • Custom webhook support
- • Documentation and examples
Color Analysis Tools
Color Suggestions
- • AI-powered recommendations
- • Brand color matching
- • Accessible alternatives
- • Color harmony analysis
Visualization Tools
- • Color blindness simulation
- • Contrast heat maps
- • Pattern analysis
- • Visual hierarchy check
Ready to Check Your Colors?
Start using our free color contrast checker tool now and ensure your designs are accessible to everyone.
Try Color Contrast Checker