The Modern Jazz Quartet (MJQ) was a jazz combo established in 1952 that played music influenced by classical, cool jazz, blues and bebop. The Quartet consisted of John Lewis (piano), Milt Jackson (vibraphone), Percy Heath, and various drummers, most notably Kenny Clarke and Connie Kay. The group grew out of the rhythm section of Dizzy Gillespie's big band from 1946 to 1948, which consisted of Lewis, Jackson, and Clarke along with bassist Ray Brown. They recorded as the Milt Jackson Quartet in 1951 and Brown left the group, being replaced on bass by Heath. During the early-to-mid-1950s they became the Modern Jazz Quartet, Lewis became the group's musical director, and they made several recordings with Prestige Records, including the original versions of their two best-known compositions, Lewis's "Django" and Jackson's "Bags' Groove". Clarke left the group in 1955 and was replaced as drummer by Kay, and in 1956 they moved to Atlantic Records and made their first tour to Europe.

Cool jazz is a style of modern jazz music inspired by bebop and big band that arose in the United States after World War II. It is characterized by relaxed tempos and a lighter tone than that used in the fast and complex bebop style. Cool jazz often employs formal arrangements and incorporates elements of classical music. Broadly, the genre refers to a number of post-war jazz styles employing a more subdued approach than that of contemporaneous jazz idioms. As Paul Tanner, Maurice Gerow, and David Megill suggest, "the tonal sonorities of these conservative players could be compared to pastel colors, while the solos of [Dizzy] Gillespie and his followers could be compared to fiery red colors."