Color Blindness Simulator
Visualize how colors appear under different types of color vision deficiency. Test individual colors or entire palettes for accessibility.
Frequently Asked Questions
What is color blindness?
Color blindness (color vision deficiency) is the reduced ability to distinguish between certain colors. It affects about 8% of men and 0.5% of women. The most common types involve difficulty distinguishing red and green hues.
How accurate are these simulations?
These simulations use scientifically-derived color transformation matrices that model how colors appear to people with different types of color vision deficiency. While no simulation is 100% perfect, these matrices are widely used in accessibility research and give a reliable approximation.
What is the difference between -anopia and -anomaly types?
Types ending in '-anopia' (e.g., Protanopia) represent complete absence of a cone type, resulting in more severe color confusion. Types ending in '-anomaly' (e.g., Protanomaly) represent a shifted sensitivity, producing a milder form of the deficiency.
Why should I care about color blindness in design?
Roughly 1 in 12 men has some form of color vision deficiency. Designing with color blindness in mind ensures your content is accessible to all users. Never rely on color alone to convey information — use labels, patterns, or icons as well.
What is Achromatopsia?
Achromatopsia (total color blindness) is a rare condition where a person sees no color at all — only shades of gray. It is caused by a complete absence or non-function of cone cells in the retina.