The Blue Hawaii was invented in 1957 by Harry Yee, legendary head bartender of the Hilton Hawaiian Village (formerly the Kaiser Hawaiian Village) in Waikiki, Hawaii when a sales representative of Dutch distiller Bols asked him to design a drink that featured their blue color of Curaçao liqueur. After experimenting with several variations he settled on a version somewhat different from the most popular version today, but with the signature blue color, pineapple wedge, and cocktail umbrella.  - source Wikipedia