1. Color

As we saw in the introduction, it's an exaggeration to think that matter has an intrinsic color. Color is first and foremost a perception. This physiological perception, which more precisely defines color, is linked to three parameters:

• the nature of the illuminated object ;

• the light that illuminates the object;

• the sensor (the eye) which receives the message and communicates it to the brain via electrical impulses.

The field of color has a rich heritage in terms of the vocabulary used to define our color sensations; color names often refer to plant species (rose,...