Shades of Deep Purple is the debut album by the English rock band Deep Purple, released in July 1968 on Tetragrammaton in the United States and in September 1968 on Parlophone in the United Kingdom. The band, initially called Roundabout, was the idea of former Searchers drummer Chris Curtis, who recruited Jon Lord and Ritchie Blackmore before leaving the project. The Mk. I line-up of the band was completed by vocalist/frontman Rod Evans, along with bassist Nick Simper and drummer Ian Paice, in March 1968.

Deep Purple are an English rock band formed in London in 1968. They are considered to be among the pioneers of heavy metal and modern hard rock, although their musical style has varied throughout their career. Originally formed as a psychedelic rock and progressive rock band, they shifted to a heavier sound with their 1970 album Deep Purple in Rock. Deep Purple, together with Led Zeppelin and Black Sabbath, have been referred to as the "unholy trinity of British hard rock and heavy metal in the early to mid-seventies". They were listed in the 1975 Guinness Book of World Records as "the globe's loudest band" for a 1972 concert at London's Rainbow Theatre and have sold over 100 million records worldwide.