Bols Blue the original Blue Curacao. Bols Blue was and still is the world’s best-selling blue curacao. Known in the previous century as Creme de Ciel it is one of the oldest flavours in the modern Bols liqueur range. Bols Blue adds a sparkling blue colour a powerful orange flavour and a superb and unique aftertaste to any cocktail. Alcohol strength: 24 percentPack format: Bottle