• teft@lemmy.world
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    2 months ago

    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.