"Why are there so many songs about rainbows?" sings Kermit the Frog in a song (about rainbows) called "Rainbow Connection" from 1979's "The Muppet Movie." And it's not just songs that feature rainbows ...

and “Roy G. Biv” to remember the colors of the rainbow (which…what is indigo even doing there?!). But we’ve got plenty more intuitive, accurate mnemonics that you may never have heard of ...