Porsche 914 in bright yellow. Car was insanely fun to drive; like an oversize go-cart. However, if it rained for more than 3 days in a row, the ignition system shorted out and it would not start. You then had to wait a day for it to dry out.
I had a yellow 1974 1.8. It had a brown leatherette interior which was unusual. I got stopped by radar cops twice during my ownership on interstates near Baltimore. Both times I was cruising in a 20+ car line in a fast lane cruise at 15-20 over the 55 mph limit. Both cops admitted that they pulled me over because the 914 was yellow. I put a set of Weber carbs on it because the fuel injection would go tits-up every time the sun split out some coronal phlegm earth’s way which was frequently. The last straw was the clutch cable breaking right after I got the carbs synced up and it was running good. I soon traded it for a new Audi Fox. A decade later I bought a ‘76 two liter that had been painted a dark maroon that looked black in the twilight. After a friend rebuilt the heads on it, I was driving south to home at dusk on an interstate taking two mile’s worth of gentle sweepers at 6,000 on the tach which was about 135 and when I hit straight after the last corner there was a Maryland State trooper in the bushy median. I had an extractor exhaust system on this car that was loud on acceleration but dead quiet on the decel so I gently got out of the throttle and coasted by the cop around 120. He never even looked up from what he was staring at. Yellow’s good for cabs and school buses but the shite for Porsches.