Rainbow Sign is a studio album containing original compositions by American jazz musician Ron Miles on the label Blue Note Records. Released on October 9, 2020 to positive critical reviews, it is Miles' final studio album, coming two years prior to his death in March 2022.

Ronald Glen Miles was an American jazz trumpeter, cornetist, and composer. He recorded for the labels Prolific (1986), Capri (1990), and Gramavision. His final album, Rainbow Sign, was his first on the Blue Note label.