Primary Colors are the basic colors from which all other colors can be mixed. Of those they are the first and most important. They can be mixed from either Ah, Why be red, yellow blue, or NYC magenta yellow Cyan. secondary colors are a combination of any two primaries in equal parts. That's from three primaries, we can derive three secondary colors. They six form the spectrum colors of the rainbow, violet, blue, green, yellow, orange, or red.