DESIGN TOOL
Color Blindness Simulator
See how a color appears under different types of color vision deficiency.
About this tool
See how a chosen color appears to people with different types of color vision deficiency — protanopia, deuteranopia, and tritanopia (red-, green-, and blue-weak vision), plus full grayscale — using standard simulation matrices. Useful for checking that color choices in a design remain distinguishable for colorblind users.
Frequently asked questions
- How common is color blindness?
- Red-green color blindness (protanopia/deuteranopia) affects roughly 1 in 12 men and 1 in 200 women of Northern European descent, making it one of the most common visual conditions to design around.
- How accurate is this simulation?
- It uses well-established approximation matrices commonly used for this purpose, giving a good general sense of appearance — but it's a simplification, not a clinically precise model of any individual's vision.
- What should I do if colors look too similar in a simulation?
- Add a non-color cue as well — different shapes, patterns, labels, or contrast levels — so information doesn't depend on color perception alone.