Deep Blue is the alias of electronic and drum and bass musician, Sean O'Keeffe.

O'Keeffe started producing music in 1991 with the hardcore band 2 Bad Mice, co-writing their hit, "Bombscare". In 1993 he began to write and release under the alias Deep Blue, producing "Helicopter Tune" (also heard in the PSP and PlayStation 2 game GTA Liberty City Stories in 2006 and in the game Midnight Club 3: Dub Edition in 2005) for the Moving Shadow record label. The track reached number 68 in the UK Singles Chart in April 1994.