Color Blindness Simulator
See how any color appears to people with color vision deficiency
#3B82F6rgb(59, 130, 246)#418EFArgb(65, 142, 250)#007DF4rgb(0, 125, 244)#009EB0rgb(0, 158, 176)#7B7B7Brgb(123, 123, 123)About Color Vision Deficiency
Approximately 8% of men and 0.5% of women worldwide have some form of color vision deficiency. Protanopia (red-blind) and deuteranopia (green-blind) are the most common types. This tool uses scientifically accurate color transformation matrices to simulate how colors appear to individuals with these conditions, helping designers create more accessible interfaces.
Color Blindness Simulator
See how any color appears to people with color vision deficiency
Features
- Simulate protanopia (red-blind), deuteranopia (green-blind), tritanopia (blue-blind), and achromatopsia
- Scientifically accurate color transformation matrices
- Real-time color preview with hex and RGB values
- Built-in color picker and preset swatches
How to use
- Pick a color using the color picker or enter a hex value.
- View the simulated appearance for each type of color vision deficiency.
- Compare the original color with all four simulations side by side.
- Copy the simulated hex values for use in your designs.
Tips & Best Practices
- Test your entire color palette, not just individual colors, to ensure all combinations are accessible.
- Use the simulated hex values to create color-blind-friendly alternatives.
- Pay special attention to red-green combinations, as they are most commonly affected.
- Ensure a minimum contrast ratio of 4.5:1 for normal text and 3:1 for large text (WCAG 2.1).
- Consider using color palettes specifically designed for color blindness accessibility.
FAQ
How accurate are these simulations?
The simulations use the Machado, Oliveira, and Fernandes (2009) color transformation matrices, which are among the most scientifically accurate models available for simulating color vision deficiency.
What is the most common type of color blindness?
Deuteranopia (green-blind) and protanopia (red-blind) are the most common, affecting approximately 6% and 2% of males respectively. Tritanopia (blue-blind) is rare, and achromatopsia (total color blindness) is extremely rare.
How can I make my designs more accessible?
Avoid relying solely on color to convey information. Use patterns, labels, and sufficient contrast. Test your color palette with this simulator to ensure critical UI elements remain distinguishable.
Is my data safe and private?
All processing happens locally in your browser. No data is sent to any server.
Is this tool free to use?
Yes, this tool is completely free with no registration required.