Out of the Blue (OOTB) is an all-male a cappella group from the University of Oxford and Oxford Brookes University in Oxford, United Kingdom. The student-run group sings an eclectic mix of songs, focusing on covers of modern rock and pop hits. Since its foundation in 2000, Out of the Blue has had success both nationally and internationally. The group frequently performs at both private and public functions in Oxford and the surrounding area, has toured the UK, Ireland, the United States, and Scandinavia, and has received critical acclaim for their performances at the Edinburgh Festival Fringe.