Colour Blindness Simulator
Preview how a foreground and background colour pair appears under protanopia, deuteranopia, tritanopia, and achromatopsia.
Simulations use the Viénot (1999) linear RGB matrices. Results are approximations suitable for design review.
The quick brown fox jumps over the lazy dog.
Large text Aa
Original
No colour vision deficiency
5.17:1
#2563ebon#ffffffThe quick brown fox jumps over the lazy dog.
Large text Aa
Protanopia
Red-blind (L cone absent)
~1% of males
6.66:1
#4848d4on#ffffffThe quick brown fox jumps over the lazy dog.
Large text Aa
Deuteranopia
Green-blind (M cone absent)
~1% of males
7.37:1
#443fceon#ffffffThe quick brown fox jumps over the lazy dog.
Large text Aa
Tritanopia
Blue-blind (S cone absent)
~0.003% of people
2.24:1
#2bc0bbon#ffffffThe quick brown fox jumps over the lazy dog.
Large text Aa
Achromatopsia
Total colour blindness
~0.003% of people
4.67:1
#747474on#ffffff