Determine about the Trichromatic vision

Trichromatic vision is the terminology used for normal vision, those who require aU' three primary colours to make a match with an unknown colour. Anomalous trichromats are those who utilize all three colours to make a match with an unknown colour but at lesser amounts. Usually, these people are colour weak, not colour blind. Dichromats are those who only need two primary colours to make a match with an unknown colour. This occurs because of an absence of one colour pigment. Monochromatism is a very rare condition in which only one primary colour is completely appreciated.