ROYGBIV
An acronym for Red, Orange, Yellow, Green, Blue, Indigo, and Violet, used as a mnemonic device for the names and sequence of the colors of the rainbow. When said aloud, the acronym is pronounced as three separate words, "Roy G. Biv." A: "Dang it, I always forget about indigo and violet when I try to think of the colors of the rainbow." B: "Just remember ROYGBIV!"
Farlex Dictionary of Idioms. © 2024 Farlex, Inc, all rights reserved.