Colour · T-08
Colour-blindness simulator
About one in twelve men sees red and green differently. View your image or palette the way they see it, and spot straight away which colours start to look too much alike.
Your files stay on your device
Questions
Good to know
What do protan, deutan and tritan mean?
Protanopia: the red cones don’t work. Deuteranopia: the green ones don’t, the most common form. Tritanopia: the blue ones don’t, rare. Achromatopsia: seeing no colour at all, very rare.
Which method should I choose?
Machado (2009) is good for red and green and also lets you choose milder forms with the severity. Brettel (1997) is more accurate for tritanopia. Both are published scientific methods.
How do I make my design easier to read?
Never let colour say something on its own: add an icon, a word or a pattern. And choose colours that also differ in lightness, not only in hue.
How it works
Colour-blindness simulator in three steps
Image or palette
Drop a screenshot or design here, or paste a list of colour codes.
Compare
Kleurstaal shows the original next to protanopia, deuteranopia, tritanopia and achromatopsia.
Adjust
For a palette, Kleurstaal points out the colour pairs that look too much alike. Give those more difference in lightness.