Black with silver on the fin.
or
Orange with white fins would look OK
or
a Cherry red would definitely look good

if I was doing it one solid color I like a raspberry black or Roman red (Impala SS color)
Maybe something more of the era would look sweet also, like the teal and salmon combo

I like setting off the fins with a contrasting color. Appears more nastalgic that way.

That's my opinion and I'm sticking to it.