Color Blindness Simulator
Simulate how images appear with different types of color blindness. Educational accessibility tool for designers and developers.
Upload Image
Drag and drop your file here, or click to browse
Supports JPG, PNG, WebP, GIF (Max 10MB)
Understanding Color Blindness
Protanopia
Red-blind. People with protanopia cannot perceive red light. Red appears as dark gray or black.
Affects ~1% of males
Deuteranopia
Green-blind. People with deuteranopia cannot perceive green light. Most common form.
Affects ~1% of males
Tritanopia
Blue-blind. People with tritanopia cannot perceive blue light. Very rare condition.
Affects ~0.001%
Achromatopsia
Total color blindness. People see only in shades of gray. Very rare.
Affects ~0.003%
Protanomaly
Weak red perception. Similar to protanopia but less severe with reduced sensitivity to red.
Affects ~1% of males
Deuteranomaly
Weak green perception. Most common color vision deficiency with reduced green sensitivity.
Affects ~5% of males
Tritanomaly
Weak blue perception. Similar to tritanopia but less severe with reduced blue sensitivity.
Affects ~0.01%
Achromatomaly
Weak color perception across all colors. Partial color blindness affecting all cone types.
Very rare
8 Filter Types
Simulate all major types of color blindness
Accurate Matrices
Scientifically accurate color transformations
Before/After Slider
Interactive comparison of original and filtered
Educational
Learn about accessibility and inclusive design
Frequently Asked Questions
What is color blindness?
Color blindness (color vision deficiency) is a condition where a person has difficulty distinguishing certain colors. It is usually inherited and affects approximately 1 in 12 males and 1 in 200 females. The condition is caused by the absence or malfunction of certain color-detecting cells in the eye called cones.
What are the different types of color blindness?
The main types include Protanopia (red-blind), Deuteranopia (green-blind), Tritanopia (blue-blind), and Achromatopsia (total color blindness). Each type has a corresponding weaker form called anomalous trichromacy: Protanomaly, Deuteranomaly, and Tritanomaly. Deuteranomaly is the most common form, affecting about 5% of males.
How accurate is this simulator?
This simulator uses scientifically accurate color transformation matrices based on research in color vision deficiency. The matrices simulate the approximate way people with different types of color blindness perceive colors. While it provides a good approximation, individual experiences may vary as color vision deficiency exists on a spectrum.
Why is this tool useful for designers?
This tool helps designers and developers ensure their content is accessible to people with color vision deficiencies. By seeing how your designs appear to colorblind users, you can make informed decisions about color choices, ensure sufficient contrast, and create more inclusive experiences. It is essential for meeting accessibility standards like WCAG.
Can I use this for accessibility testing?
Yes! This tool is perfect for accessibility testing. Upload screenshots of your designs, website, or app to see how they appear to users with different types of color blindness. This helps identify potential issues with color-dependent information and ensures your designs work for all users.
Is my image data private?
Absolutely. All processing happens entirely in your browser using client-side JavaScript. Your images are never uploaded to any server, ensuring complete privacy and security. The images stay on your device throughout the entire process.