Pan Galactic Gargle Blaster

These are three of the most interesting images that I pulled out of Google Images from the term 'Pangalactic Gargle Blaster'. It's the fictional, and potent cocktail from Hitch Hiker's Guide to the Galaxy, created by Zaphod Beeblebrox. I'm not entirely sure what colour it is, it's never really described physically in the books though it is supposedly like "is like having your brain smashed out by a slice of lemon wrapped round a large gold brick." Without images, I imagine it to be an insane neon colour like shockingly blue or green.