Cuilén mac Ildulb (Modern Gaelic: Cailean), sometimes anglicised as Culen or Colin, and nicknamed An Fionn, "the White" (died 971) was king of Scotland (Alba) from 967 to 971. He was one of the three known sons of King Indulf (Ildulb mac Causantín), the others being Amlaíb and Eochaid.