Weight loss red and blue mix to make purple. What color shall we call it? Red and blue can be turned into purple, but different proportions of red and blue produce different purple. As we all know, red, yellow and blue are three primary colors, and different mixtures of the three colors produce colorful colors. When red and blue are mixed, the color becomes purple, but the purple produced by different proportions of red and blue is different: a lot of red and a little blue can produce red and purple, and a lot of blue and a little red can produce blue and purple. The color changes of the components that gradually increase blue in red are: red, red purple, purple, purple blue, blue purple.