The term 'color-normal' is derived from the words 'color' and 'normal', where 'color' refers to the property of objects that results from the light they emit or transmit, and 'normal' means conforming to a standard or usual state.

The term 'color-normal' has been used in modern English to describe individuals with standard color vision, contrasting with those who have color vision deficiencies.

Initially, it meant having standard color vision, and this meaning has remained consistent in modern usage.