Color Toolkit
Color Blind Simulator — Preview Images Across 6 Vision Types
Upload any image and simulate how it appears to people with Protanopia, Deuteranopia, Tritanopia, Achromatopsia, and more. Free, browser-based, no upload required.
FAQ
What is color blindness simulation?
Color blindness simulation transforms an image's colors to approximate how someone with a specific type of color vision deficiency perceives it. It uses mathematical transformation matrices applied to each pixel's RGB values.
What is Protanopia?
Protanopia is a form of red-green color blindness where the red cone cells are absent. People with protanopia cannot distinguish red from green and see reds as very dark or black.
What is Deuteranopia?
Deuteranopia is the most common form of color blindness, affecting about 5% of males. Green cone cells are absent, making it difficult to distinguish red from green.
What is Achromatopsia?
Achromatopsia is complete color blindness — the person sees only shades of gray. It is very rare (about 1 in 30,000 people) and is often accompanied by light sensitivity and poor visual acuity.