Lyrics from "Ventura Highway" by the folk-rock band America, circa mid 1970's:

"Sorry, boy, but I've been hit by purple rain.
Oh c'mon, Joe, you can always change your name."

Either Prince, as a young teenager, was a lyric consultant to the folk-rock scene or a seed was planted in his head early on. Awfully close to 1984 and 1993, don't you think?