Colour blindness simulation
L sensitivity shift (+- 80)
M sensitivity shift (+- 80)
S sensitivity shift (+- 80)
Deuteranomaly (common, ~8% of males)
M is shifted towards L (positive). Reds and greens get harder to distinguish.
Protanomaly (rare, ~1% of males)
L is shifted towards M (negative). Reds become darker, and reds and greens get harder to distinguish.