Simulate how colors look with different types of color blindness
CSS Tools
About This Tool
The Color Blindness Simulator lets you pick any color and instantly see how it appears to people with Protanopia, Deuteranopia, Tritanopia, and Achromatopsia. It uses scientifically accurate color transformation matrices to produce side-by-side comparisons with RGB and HEX values for each simulation.
Key Features
- Simulate Protanopia, Deuteranopia, Tritanopia, and Achromatopsia
- Color picker and hex input for precise color selection
- Side-by-side comparison grid with normal vision baseline
- Sample colors and random color generation for quick testing
- Displays simulated RGB and HEX values for each type
- Scientifically accurate color transformation matrices
Use Cases
- Test UI color choices for accessibility compliance
- Ensure data visualizations are readable by all users
- Validate brand colors for color-blind friendly design
- Educational tool for understanding color vision deficiency
- Check CSS color palettes before deploying to production
color-blindness
accessibility
a11y
simulation
Frequently Asked Questions
What types of color blindness does this tool simulate?
The tool simulates four types: Protanopia (red-blind), Deuteranopia (green-blind), Tritanopia (blue-blind), and Achromatopsia (total color blindness). Each uses a scientifically validated color transformation matrix.
How accurate are the simulations?
The simulations use well-established color transformation matrices from vision science research. While they provide a good approximation, individual experiences of color blindness vary, so these should be used as guidelines rather than exact representations.
Can I test multiple colors at once?
The tool simulates one color at a time, but you can quickly switch between colors using the color picker, hex input, sample colors button, or random color button. Each change instantly updates all five simulation panels.
Is my data sent to any server?
No. All color transformations and simulations are computed locally in your browser using JavaScript. No data is uploaded to any server, ensuring your information remains completely private.
How can I use this for accessibility testing?
Pick the colors used in your design or application, then check if the simulated versions remain distinguishable from each other. If colors become too similar under any simulation type, consider adjusting your palette to ensure accessibility for all users.