In Blue is the third studio album by Irish pop rock band the Corrs, released in 2000 which saw the band become known in the United States. The title of the album comes from a lyric in the song "Give Me a Reason". As well as the UK number one single "Breathless", the album also contains new versions of "Radio" and "At Your Side", which had appeared on their previous album The Corrs Unplugged. Mutt Lange co-wrote and produced three songs from the album.
Several of the tracks were used in various television programmes and films: "Rebel Heart" as the theme for the TV miniseries of the same name; "One Night" in Mad About Mambo; "At Your Side" in Say It Isn't So and the trailer for the film The Holiday; and "All the Love in the World" in the film America's Sweethearts. At the 43rd Annual Grammy Awards, "Breathless" was nominated for Best Pop Performance by a Duo or Group with Vocals, while "Rebel Heart" was nominated for Best Pop Instrumental Performance.