What colors make up a rainbow? July 28, 2020 by Pamela Landy The colors red, orange, yellow, green, blue, indigo, violet make up a rainbow. Related Answers What was a summoner or A canon’s yeoman or A franklin or A manciple or a reeve? How many candies of each color go into the average bag of M&M’s? Who wrote the Pledge of Allegiance? What is the rainbow in Thomas Pynchon’s Gravity’s Rainbow (1973)? Do different species of animals have different colors of blood? What do the colors of the black liberation flag stand for?