Peter Bohrmann Bartender's Guide, which was always a bargain book in America 15 years ago, has this Bluegrass Recipe:
In a shaker, with ice: 1 oz bourbon, 1 oz lemon juice, 3/4 ox lime juice, 1/2 oz blue curacao, 1/2 oz Southern Comfort. Shake, pour into highball glass, garnish w a maraschino cherry and lemon peel. I made this version and it was much like a dry whiskey sour, although more medicinal. Color: cerulean blue (teal). A drop extra of S Comfort improved the flavor. Dry, Boozy