Khery Sameer Rajab popularly known as Mr Blue, is a Tanzanian RnB and Bogo Flava musician born on April 14, 1987.MR BLUE Profile & Lyrics. MR BLUE has a total of 22 Song Lyrics and Featurings on Afrika Lyrics. Country : Tanzania. Genre : Bongo Flava, . Follow MR BLUE on the social networks Facebook, Twitter, Instagram and Youtube by cliking on the icons below.