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BurningFrog 4 days ago

The Aurora colors are similarly universal.

The most common green color from excited nitrogen molecules going back to normal by emitting 557.7 nanometer photons. Oxygen makes 650 nm red, and the 427.8 nm blue is from nitrogen ions.

hinkley 3 days ago | parent [-]

So with human cones at 564–580 nm, 534–545 nm, and 420–440 nm, seems like we could do with one cone being redesigned.