Colorblind Friendly Checker
Test your color combinations for accessibility with different types of color vision deficiency.
About Colorblind Checker
Approximately 8% of men and 0.5% of women have some form of color vision deficiency. Our Colorblind Friendly Checker simulates how your color combinations appear to people with protanopia (red-blind), deuteranopia (green-blind), and tritanopia (blue-blind).
Testing your designs for colorblind accessibility ensures your content is readable and usable by everyone, which is both a moral imperative and often a legal requirement.
Test Color Pair
Suggested Alternatives
How to Use
Set Your Colors
Enter the foreground and background colors you want to test.
Review Simulations
See how the color pair looks for each type of color vision deficiency.
Apply Suggestions
If a pair fails, use the suggested accessible alternatives.
Frequently Asked Questions
What is protanopia?
Protanopia is a type of colorblindness where the red cones are absent. People with protanopia have difficulty distinguishing between red and green colors, and reds appear darker.
What is deuteranopia?
Deuteranopia is the most common form of colorblindness. The green cones are absent, making it hard to distinguish red from green. Unlike protanopia, brightness perception is normal.
What is tritanopia?
Tritanopia is a rare form of colorblindness where blue cones are absent. People have difficulty distinguishing between blue and yellow, and between light blue and gray.
How can I make my design colorblind-friendly?
Use sufficient contrast, avoid relying solely on color to convey information, use patterns or icons alongside colors, and test your designs with colorblind simulation tools like this one.
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