There are different sets of primary colors that are generally recognized by the field of art and science and are often related to in an abbreviated format are Why be red, yellow, blue, RGB, red, green, blue, and cm why k cyan yellow, magenta black. They are quite simple to understand, and they serve different purposes. until the middle of the 19th century, there was confusion over which were the true primary colors. The end use or aim will dictate which set of primary colors are to be used. Simply stated, primary colors are ones that cannot be mixed or formed by any combination of other colors. A balanced mix Have all three primaries adds up to black when mixing pigments, but the results can vary depending on which type of colorant is used.