I think Red & Yellow definitely turn heads the most.
The only time I ever got pulled over was in my red Vette on the way to Laughlin.
Hubby was driving and the CHP officer was ticked he couldn't get us on speed, so wrote a fix-it ticket for no front plate
My yellow Vette is faster than my red one and all my street rods have been yellow (except my truck, but it has yellow paint showing through under the orange)
....so I vote
YELLOW is FASTEST!