Khery Sameer Rajab (better known by his stage name as Mr. Blue; born April 14, 1987) is a R&B musician by Bongo Flava from Tanzania. He rose to prominence and became popular with fans, soon after entering the music industry with his song 'Mr Blue'. Where it later came to be as if it were his artistic name. Mr Blue had a chat with the song 'Mr Blue' before he came to prominence with his song 'Mapozi', which made him even more popular due to the arrangement of the poems and sounds he used as well as the musical tricks of the instrument itself.