Color Blindness Simulator
Preview how colors appear to people with different types of color vision deficiency
Test a Color
Color Vision Types
Test an Image (Optional)
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What is Color Blindness?
Color blindness (color vision deficiency) affects approximately 8% of men and 0.5% of women worldwide. People with color blindness see colors differently—certain colors may appear muted, similar to each other, or completely different than what others perceive.
This simulator helps designers and developers understand how their color choices appear to users with different types of color vision deficiency. Test your colors and images to ensure your designs are accessible to everyone.
Types of Color Vision Deficiency
Red-Green Color Blindness (Most Common)
- Protanopia: Cannot perceive red light
- Deuteranopia: Cannot perceive green light
- Protanomaly/Deuteranomaly: Reduced sensitivity
Blue-Yellow Color Blindness (Rare)
- Tritanopia: Cannot perceive blue light
- Tritanomaly: Reduced blue sensitivity
Complete Color Blindness (Very Rare)
- Achromatopsia: Sees only shades of gray
Accessible Design Tips
- Don't rely on color alone: Use icons, patterns, or text labels alongside color indicators.
- Ensure sufficient contrast: WCAG recommends 4.5:1 for normal text, 3:1 for large text.
- Use color-blind-safe palettes: Blues and oranges work well; avoid red-green combinations.
- Test with simulators: Check your designs with tools like this before shipping.
- Provide alternatives: Let users customize colors or provide high-contrast modes.
Color Blindness Statistics
| Type | Male | Female |
|---|---|---|
| Deuteranomaly | 5% | 0.4% |
| Protanomaly | 1% | 0.01% |
| Deuteranopia | 1% | 0.01% |
| Protanopia | 1% | 0.01% |
Frequently Asked Questions
Can color blindness be cured?
Currently there's no cure, but special glasses (like EnChroma) can help some people distinguish colors better. Gene therapy research is ongoing.
Do color-blind people see in black and white?
Almost never. Only achromatopsia (extremely rare) causes complete color blindness. Most color-blind people see colors, just differently.
Is this simulation 100% accurate?
Simulations are approximations based on scientific color transformation matrices. Individual experiences vary, but these provide a good general understanding.