Color Blindness Simulator — Accessibility Testing
Test how colors appear with different types of color vision deficiency.
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📊 Color Blindness Types
Protanopia (Red-blind): ~1% males - Cannot perceive red light
Deuteranopia (Green-blind): ~1% males - Cannot perceive green light
Tritanopia (Blue-blind): ~0.001% - Cannot perceive blue light
Protanomaly: ~1% males - Reduced red sensitivity
Deuteranomaly: ~5% males - Reduced green sensitivity (most common)
Tritanomaly: Very rare - Reduced blue sensitivity
Achromatopsia: 1 in 30,000 - Complete color blindness
Achromatomaly: Very rare - Blue cone monochromacy
♿ Accessibility Tip: Don't rely solely on color to convey information. Use text labels, patterns, or icons alongside colors. Ensure sufficient contrast ratios (use our Contrast Checker tool).
About Color Blindness Simulator
The Color Blindness Simulator helps designers and developers test how colors appear to people with various types of color vision deficiency. See your chosen colors through the eyes of users with Protanopia, Deuteranopia, Tritanopia, and other conditions.
Essential for accessible design, this tool simulates 8 different types of color blindness using scientifically accurate color transformation algorithms. Test individual colors or compare multiple colors side-by-side to ensure your designs work for everyone.
How to Use Color Blindness Simulator
- Pick a color using the color picker.
- View how that color appears with different types of color blindness.
- Compare your original color to simulated versions.
- Test multiple colors to check contrast and distinguishability.
- Use insights to create more accessible color schemes.
Key Features
Simulate 8 types of color blindness
Protanopia, Deuteranopia, Tritanopia simulation
Protanomaly, Deuteranomaly, Tritanomaly
Achromatopsia (complete color blindness)
Achromatomaly (blue cone monochromacy)
Side-by-side color comparison
Scientific color transformation algorithms
100% client-side processing
Frequently Asked Questions
What is color blindness?
Color blindness (color vision deficiency) is a condition where someone cannot distinguish certain colors. The most common type is red-green color blindness, affecting about 8% of men and 0.5% of women of Northern European descent.
What is the difference between Protanopia and Deuteranopia?
Both are red-green color blindness types. Protanopia is red-blindness (missing red cones), making reds appear dark gray/black. Deuteranopia is green-blindness (missing green cones), with similar but slightly different color confusion. Both affect about 1% of males.
What is Tritanopia?
Tritanopia is blue-yellow color blindness caused by missing or malfunctioning blue cones. It's very rare (less than 0.01% of people) and causes confusion between blue-green and yellow-red colors.
How can I design for color blind users?
Use sufficient contrast, don't rely solely on color to convey information, use patterns or textures alongside colors, test with simulators like this one, and consider using color-blind friendly palettes with distinct hues.
What is Achromatopsia?
Achromatopsia (complete color blindness) is an extremely rare condition where people see only in grayscale. It affects about 1 in 30,000 people. This simulator shows how colors appear in pure black and white.