Indigo is a name that has been used many times.
(1) Current UK dubstep/ambient/dub techno producer.
(2) A German progressive rock band of the 70s and 80s.
(3) An Austrian band of the 80s and 90s.
(4) A Maltese pop/rock band of the 00s, fronted by Marvic Lewis.
(5) Alternative Metal band from Uruguay.
(6) UK Hi-NRG dance act.
(7) USA indie hiphop artist.
(8) USA Jazz band.
(9) A rock band of PERU.
(10) Late 90s USA IDM artist.
(11) Russian alternative rock band.