Color Contrast Checker
Ensure your color combinations meet WCAG accessibility standards. Test contrast ratios, get compliance ratings, simulate color blindness, and receive suggestions for better accessibility.
🚀 Quick Test Combinations
Color Input Controls
Text Color (Foreground)
Background Color
🎨 Current Color Values
Text Color
Hex: #000000
RGB: rgb(0, 0, 0)
HSL: hsl(0, 0%, 0%)
Background Color
Hex: #ffffff
RGB: rgb(255, 255, 255)
HSL: hsl(0, 0%, 100%)
Contrast Results
WCAG Compliance Check
Level AA (Standard)
Minimum Recommended14px+ (4.5:1 required)
18px+ or 14px+ bold (3:1 required)
Buttons, form controls (3:1 required)
Level AAA (Enhanced)
Gold Standard14px+ (7:1 required)
18px+ or 14px+ bold (4.5:1 required)
📊 Technical Details
Luminance Values
Foreground: 0
Background: 1
Ratio: 21
WCAG Guidelines
• AA Normal: 4.5:1 minimum
• AA Large: 3:1 minimum
• AAA Normal: 7:1 minimum
• AAA Large: 4.5:1 minimum
Visual Preview
Text Color
#000000
Background Color
#ffffff
Font Size Testing
Text Variations
Sample Heading Text
Sample Subheading
The quick brown fox jumps over the lazy dog. This pangram contains every letter of the alphabet and serves as an excellent test for font rendering and readability at various sizes.
Image caption or small descriptive text
"Design is not just what it looks like and feels like. Design is how it works." — Steve Jobs
♿ Accessibility Summary
Current Status
Contrast Ratio: 21:1
Overall Level: AAA
Mode: Normal Colors
WCAG Compliance
Normal Text: AA ✓
Large Text: AA ✓
UI Components: AA ✓
👁️ Color Blindness Simulation
👁️ Color Blindness Simulation
See how your color combination appears to people with different types of color vision deficiency. This helps ensure your design is accessible to the ~8% of men and ~0.5% of women with color blindness.
Normal Vision
92% of populationNo color vision deficiency
Sample Heading Text
The quick brown fox jumps over the lazy dog
Protanopia
1% of populationRed-blind (missing L-cones)
Sample Heading Text
The quick brown fox jumps over the lazy dog
Deuteranopia
1% of populationGreen-blind (missing M-cones)
Sample Heading Text
The quick brown fox jumps over the lazy dog
Tritanopia
0.003% of populationBlue-blind (missing S-cones)
Sample Heading Text
The quick brown fox jumps over the lazy dog
Achromatopsia
0.003% of populationComplete color blindness (monochrome)
Sample Heading Text
The quick brown fox jumps over the lazy dog
Understanding Color Blindness
Types of Color Blindness
- Protanopia: Difficulty seeing red colors
- Deuteranopia: Difficulty seeing green colors
- Tritanopia: Difficulty seeing blue colors
- Achromatopsia: Complete color blindness (rare)
Design Tips
- • Don't rely solely on color to convey information
- • Use patterns, shapes, or text labels as backup
- • Maintain strong contrast ratios
- • Test critical interfaces with simulation tools
Contrast Results
WCAG Compliance Check
Level AA (Standard)
Minimum Recommended14px+ (4.5:1 required)
18px+ or 14px+ bold (3:1 required)
Buttons, form controls (3:1 required)
Level AAA (Enhanced)
Gold Standard14px+ (7:1 required)
18px+ or 14px+ bold (4.5:1 required)
📊 Technical Details
Luminance Values
Foreground: 0
Background: 1
Ratio: 21
WCAG Guidelines
• AA Normal: 4.5:1 minimum
• AA Large: 3:1 minimum
• AAA Normal: 7:1 minimum
• AAA Large: 4.5:1 minimum
💡 Quick Tips
Start with High Contrast
Begin with black on white, then adjust colors while maintaining contrast.
Test Color Blindness
Always check your design with color blindness simulations.
Test on Mobile
Colors can appear different on various screens and lighting conditions.
Aim for AAA
When possible, exceed minimum requirements for better accessibility.