Molecules of Color


Pigments appear the colors they are because they selectively reflect and absorb certain wavelengths of visible light. White light is a roughly equal mixture of the entire spectrum of visible light with a wavelength in a range from about 375 or 400 nanometers to about 760 or 780 nm. When this light encounters a pigment, parts of the spectrum are absorbed by the molecules or ions of the pigment.

Why is a blue pigment the color blue?

light being absorbed and reflected

A wide variety of wavelengths (colors) encounter a pigment. This pigment absorbs red and green light, but reflects blue, creating the color blue.

Colored Pigments found in Foods and used as Food Coloring Molecules
Beta Carotene Zeaxanthin
Astaxanthin Chloropyll

See also: