"Forty Shades of Green" is a song about Ireland, written and first performed by American country singer Johnny Cash. Cash wrote the song in 1959 while on a trip to Ireland; it was first released as a B-side of the song "The Rebel–Johnny Yuma" in 1961. It is also included in two of Cash's albums: Ring of Fire: The Best of Johnny Cash, released on Columbia Records in 1963, and Johnny Cash: The Great Lost Performance – Live at the Paramount Theatre, Asbury Park, New Jersey, recorded live in 1990 and released in 2007.