Most humans are trichromats which means they possess 3 independent channels for conveying color information, derived from the 3 different types of cone cells in the eye.
Tetrachromats have 4 independent channels for conveying color information, derived from 4 different types of cone cells in the eye. This lets them see a larger color space than trichromats.
Most humans are trichromats which means they possess 3 independent channels for conveying color information, derived from the 3 different types of cone cells in the eye.
Tetrachromats have 4 independent channels for conveying color information, derived from 4 different types of cone cells in the eye. This lets them see a larger color space than trichromats.
Maybe your wife is a tetrachromat.
I can see the difference just fine; I’m male.