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Simulate color blindness online for free. Test accessibility for color vision deficiency. A11y testing.
Preview how colors appear with different types of color blindness
Original Color
#3B82F6
As Seen with Normal Vision
#3B82F6
Red
Green
Blue
Yellow
Purple
Orange
Color blindness (color vision deficiency) affects approximately 1 in 12 men and 1 in 200 women worldwide.
The most common types are red-green color blindness (protanopia and deuteranopia), where it's difficult to distinguish between reds, greens, yellows, and browns.
When designing interfaces, use color combinations with sufficient contrast and don't rely solely on color to convey information. Add text labels, patterns, or icons to improve accessibility.
Choose type of color blindness to simulate
Select a color using picker or enter hex code
See original vs simulated color
Try common colors to understand impact
Choose type of color blindness to simulate
Select a color using picker or enter hex code
See original vs simulated color
Try common colors to understand impact
About 1 in 12 men (8%) and 1 in 200 women (0.5%) have some form of color vision deficiency.
Red-green color blindness (protanopia and deuteranopia) is most common, affecting about 99% of color blind people.
Simulations use established color transformation matrices but may not perfectly match individual experiences.
Not necessarily, but don't rely on color alone. Add labels, patterns, or icons to convey information.