Re: Most eye-grabbing single colour for guitar
Seriously, though, there is nothing more eye-catching that silver or gold metalflake, but for the era and style you're talking about it would have been dayglo pink, yellow, green, or white just like so many others have said.
I just went to a show where a guy way in the back (it was a stage show, not a concert, and he was behind all the performers) had a gold sparkle guitar and it stood out like crazy all the way from the balcony.