You have to ask? (-:
Years ago, I visited the Star Trek Experience in Las Vegas, where they had “Quark’s Bar.” Geek factor aside it turned out to be the cheapest place to drink, so we holed up in there a few nights.
Their drinks were all themed, and they did IIRC “Trillian Ale” which was basically lager with a load of blue food colouring. After a session on those, I awoke the next morning, went to perform my ablutions, turned round to flush and was greeted by a fluorescent green Richard winking back at me from the bowl. Bit of a shock to the system till I realised what’d caused it.