If you look inside a computer or TV screen, you'll see they contain only three colors of light: red, green and blue. The three specific cone cells in our eyes work together, allowing us to translate these three colors of light into millions of different colors.
That’s not really the answer I‘m getting directly to, Then/Which only the several colors it think are the best colors to pick out out of million colors(?)
I may give you color samples like from low to high bits level of colors, mostly in square blocks of colors(?)