On what does the color of light depend?

If light is traveling through a medium (i. e. air), the color of light depends on the wavelength.

The following are wavelength intervals of colors on the visible light spectrum. Measured in nanometers (nm).

Red: 700-635 nm

Orange: 635-590 nm

Yellow: 590-560 nm

Green: 560-520 nm

Blue: 490-450 nm

Violet: 450-400 nm