What was unique and new to the black culture of the Harlem Renaissance that even attracted white people

The Jazz music.

Explanation:

At the time of the Harlem Renaissance in the early 20th century, many new social and creative developments took place in the African American culture specifically in literature, music, and art at Harlem in New York City.

However, the most unique and new to the black culture of the Harlem Renaissance that even attracted white people was the Jazz music. Louis Armstrong, Duke Ellington, Bessie Smith, etc became the most celebrated artists of Jazz music even to this day.