Rainbow were a hard rock and heavy metal band formed by former Deep Purple guitarist Ritchie Blackmore in 1975. In addition to Blackmore, the band originally consisted of former Elf members lead singer Ronnie James Dio, keyboardist Mickey Lee Soule, bassist Craig Gruber, and drummer Gary Driscoll. Over the years Rainbow went through many lineup changes.---------------------------------History The Dio Years In 1974 Blackmore became infuriated at the funk/soul elements being introduced to Deep Purple by David Coverdale and Glenn Hughes as well as with the rejection from his bandmates of his suggestion to record a cover for inclusion in Stormbringer, and originally intended to record "Black Sheep of the Family", a song written and recorded by the band Quatermass, as a solo single to express that his ideas were being suppressed in Deep Purple. During recent US tours Deep Purple's support band had been Elf, and Ritchie had been impressed by Elf's singer, one Ronnie James Dio. Blackmore...