"Blue Lines" is the debut studio album by the British musical group Massive Attack, released in 1991. The album is known for its innovative blend of genres, including trip-hop, dub, and soul, which helped define the sound of the early 1990s. It features collaborations with various artists, including Shara Nelson and Horace Andy, and includes popular tracks like "Unfinished Sympathy" and "Safe from Harm." The album received critical acclaim for its atmospheric production and emotional depth. It is often credited with influencing a wide range of artists and genres, paving the way for future developments in electronic and alternative music. "Blue Lines" remains a significant work in the history of modern music.