The colour of the Boudier Blue Curaçao is a gorgeous "lagoon blue", lighter than most other of its Blue Curaçao colleagues, fantastic on the rocks with its veering-towards-turquoise hue. That said, in certain cocktails where an assertive and darker blue source is required, it may be better to rely on other brands where a rich royal blue can predominate over the colours of other ingredients. The context is paramount. But the Boudier blue colour, in and of itself, is uplifting and superb.