Upload an image to see how it appears to people with different types of colour blindness — essential for accessible design.
The simulator covers Protanopia, Deuteranopia, Tritanopia, their milder anomalous forms (Protanomaly, Deuteranomaly, Tritanomaly), and Achromatopsia (total colour blindness). Matrices follow the Vienot 1999 / Brettel 1997 models.
No. Images are processed entirely in your browser using a canvas — nothing is sent to any server.
Colour blindness is a spectrum and individual perception varies. These matrices give a useful approximation for design review but cannot match any specific person's vision exactly.