How Do You Describe A Rainbow?

How Do You Describe A Rainbow? Here are some adjectives for rainbow: magnificent lunar, colored, lunar, small wavy, last diffuse, narrow, silvery, beautiful lunar, black, alien, subtle sartorial, extraordinary circular, thick but tiny, immense multicolored, dim secondary, fainter, secondary, particular bloody, improbable luminous, big pumped-up. How do you describe a rainbow to a blind person?