"But the song equates the moon's blue color with sadness." Blues music became a national fad in about 1916. Lorenz Hart had written the lyrics to "Blue Ocean Blues" (a new lyric for his own "Atlantic Blues") in the late '20s. When Hart came up with "Blue Ocean Blues," there were already "I've Got The Blue Ridge Blues" by Mason, Cooke, and Whiting (1918, eleven years after Maggio encountered a black guitarist who played a 12-bar number the guitarist called "I Got The Blues"), "Bluin' The Blues" by LaRocca, Shields, and Ragas (1918), "Blue Bird Blues" by Zerse (1920), "Blue Bell Blues" by Jerome and Goldstein (1920), "Blue Jay Blues" by Lada and Rizzo (1920), "Those Regretful Blues Always Makes Us Blue" by Smith and Huntington (1920), "Blue Sunday Blues" by Freeman (1920), "I'm Gonna Get The Blue Jazz Blues" by Ersfeld, Moriter, and Huntington (1921), "Blue Danube Blues" by Caldwell and Kern (1921), "Those Blue Law Blues" by Birdsall and Richard (1921), "Oh Don't Take Away Those Jakey Blue Blues" by LeVitre and Bernard (1921), "Blue Island Blues" by Hall, Geise, and O'Hara, "Blue Grass Blues" recorded by the Original Memphis Five, "Blue Blues" by McKenzie and Selvin, "Deep Blue Sea Blues" recorded by Clara Smith, "Blue Monday Blues" by DeSylva and Gershwin, "Blue Woman's Blues" recorded by Hattie Garland, "Black And Blue Blues" by Marsh and O'Brien, etc.