Color blindness

See an image as a color-blind person does.

What it does

Your image as a color-blind person sees it, next to the original: to check a poster, a chart, a grade or an interface.

About 8 % of men and 0.5 % of women see colors differently, mostly reds and greens. The four types here are the full forms; milder forms (“anomalies”) are more common and look in between.
Simulation: the matrices of Machado, Oliveira and Fernandes (2009), applied in linear RGB. A good guide, not an exact view of every person.
Good habits: don’t carry information by color alone (add shapes, labels, patterns), and check light and dark contrast (see the Contrast tool).
Your image stays on your device, for this visit only.

Free, no account, nothing is sent: it runs in your browser, even offline.