White light is made up of all colors. The rainbow is actually the decomposition of white light by droplets of water like a prism.
Each color corresponds to an electromagnetic radiation of particular frequency and wavelength.
The sensitivity of the eye is maximum around 550 nm, in the yellow-green. The spectrum of visible light ranges from 400 to 780 nm but its perception depends on each individual (tastes and colors ...).
The colors that are visible to our human eyes are given by a certain spectrum of light defined by a range of wavelengths of energy. A typical human eye can see a spectrum of wavelengths of energy that are from about 380 to 740 nanometers. The colors of the visible light range from violet (380–450 nm) to red (625–740 nm).
