The order of the colors in a rainbow from top to bottom are red, orange, yellow, green, blue, violet.
However, if you see a double rainbow, with a larger but fainter secondary rainbow outside the main rainbow, the colors will be reversed in the second rainbow.
A supernumerary rainbow, also also known as a stacker rainbow, consists of several faint rainbows on the inner side of the main rainbow, and is rarely seen.
In Norse Mythology a rainbow called the Bifröst Bridge, also known as Rainbow Bridge, connects Ásgard and Midgard, which are the homes of the gods and humans.
