"Boy Blue" is a song written by Jeff Lynne and performed by the Electric Light Orchestra (ELO) which first appeared as track number 3 from their 1974 album Eldorado.

Eldorado is the fourth studio album by the Electric Light Orchestra (ELO). It was released in the United States in September 1974 by United Artists Records and in the United Kingdom in October 1974 by Warner Bros. Records.