Noted for its beautiful color, this old-school gin Aviation cocktail is as blue as the sky. Created before Prohibition, this staple was lost to the United States after the Noble Experiment. Luckily, the return of lots of classic liqueurs and quality spirits put this cocktail back on the market.
I found a recipe for Aviation in a small book titled "Old Man Drinks." It didn't have the "creme de violette"; it called basically for equal parts of Maraschino liqueur & lemon juice with a couple ounces of gin. Of course it's not blue, but yellowish from the lemonade. Still: works for me!