spectrum of color

Polychromatic light spectrum after splitting by dispersion system, in accordance with the size of the light wavelength or frequency of the sequential arrangement pattern formation. The largest part of the spectrum is a part of the visible spectrum of the electromagnetic spectrum visible to the human eye, in the wavelength range of visible electromagnetic radiation is referred to. Spectrum does not contain all the colors of the human brain can distinguish visually, such as brown and pink. Entries color explains why this phenomenon.

this is my spectrum of colors it is about grains , i shoot  a lot of different colors and varieties grains.
                                 

and from this spectrum of color , i did this bag.