Copper Blue is the debut album of the U.S. alternative rock band Sugar. It was voted 1992 Album of the Year by the NME. All of the songs were written by guitarist/vocalist Bob Mould, who also co-produced with Lou Giordano. The song "The Slim" is about losing someone to AIDS. Musically, the band continues the thick punk guitar of Mould's previous band, Hüsker Dü, while slowing the tempo and emphasizing melody even more.
A limited edition initial run of the CD was released by Rykodisc in a front-and-back metal copper sleeve with each of the 2,500 copies containing a one-of-a-kind Polaroid photo taken by one of the three band members and stamped on the back with "Sugar Copper Blue Summer '92."
Several tracks were recorded for this album, but were not included. Mould decided to release them separately as an EP entitled Beaster.
Rykodisc released a remastered version pressed on 180-gram vinyl on June 21, 2011. It is accompanied by a drop card for a free download of the digital version.
In July 24, 2012, the album was reissued by Merge Records as a 3-disc set containing the full album accompanied by B-sides (disc 1), the Beaster EP (disc 2), and a 1992 live performance at the Cabaret Metro (disc 3).
In August 2012, Bob Mould and his band embarked on a "Copper Blue Tour", playing the album in its entirety at several European venues.