"Tangled Up in Blue" is a song by American singer-songwriter Bob Dylan, which was released as the opening track on his 15th studio album Blood on the Tracks (1975). The song was written by Dylan and produced by David Zimmerman, Dylan's brother. Released as a single, it reached No. 31 on the Billboard Hot 100. The song concerns relationships and contains different narrative perspectives. Dylan has altered the lyrics in subsequent performances, changing the point of view and details in the song.