Color Blindness Simulator

See how your design, chart or photo looks with protanopia, deuteranopia, tritanopia and no colour vision. Free accessibility check, private.

Drop a design, chart or photo

JPG, PNG, WebP

About 1 in 12 men see colour differently. Check that charts, maps and buttons still make sense without colour. Runs in your browser.

How to use Color Blindness Simulator

Drop a design, chart, map or photo.
Compare the original with four types of colour-vision deficiency.
Save any version to share with your team.

Good to know

Runs in your browser; nothing is uploaded.

Privacy

Runs entirely in your browser. Nothing you enter or open here is uploaded.

Questions

How accurate is it?

It uses the Machado (2009) model used by most accessibility tools. Real vision varies from person to person, so treat it as a guide.

Related tools