Bols Blue Curacao Liqueur offers a luminous blue hue, a strong orange taste, and an unparalleled aftertaste. It is an excellent substitute for Triple Sec in cocktails (e.g. Margarita Azul) and is terrific when served with soda or orange juice. Bols Blue has one of the oldest recipes of any Bols liqueur, formerly known as Crème de Ciel.