Muddle basil, mint, and a wedge or thick (1/4") slice of orange. Add gin, creme de violette, and campari and shake very well with lots of ice. Strain and serve up or over one large ice cube.
If you don't like how sweet Creme de Violette can be, and you don't like how bitter Campari can be, just mix them together! The layers of flavor in this drink are great.