Question: What was the race of the man whose "St. Louis Blues."  were depicted in Blue Rhythm?
Sentence (from "Blue on Blue (Bobby Vinton album)"): Cover versions include the jazz songs "St. Louis Blues" and "Blueberry Hill", "Am I Blue", "Blue, Blue Day", the Fleetwoods' hit "Mr. Blue", "My Blue Heaven", three show tunes ("Blue Skies", "Blue Hawaii" and "Blue Moon"), and The Clovers Rhythm and blues hit, "Blue Velvet".
Relevant evidence: No