Lurid blue, easy-drinking zesty citrusy. This cocktail is also known as The Swimming Pool and lounging beside one, or at least imagining you are, is what...
I've now added Charles Schumann's Swimming Pool cocktail to Difford's Guide and referenced with a link above. Many thanks for bringing to my attention.
https://www.munich.travel/en/pois/eat-drink/cocktails-deluxe
The educatedbarfly as has a nice page/video regarding the history of the cocktail.