Back in the seventies, there were studies done as to which is the easiest to see car color. The two top ones were chartreuse, (yellow-green), and orange. I couldn't help but notice but a very large percentage of the foreign cars, (in the seventies, a foreign car outside of a VW bug was a novelty), were one of these two colors.
I always wondered if it had anything to do with the fact that in the era of big American cars, the foreign cars were so much smaller and needed to be seen by the larger American car drivers to avoid getting hit. In car accidents, size does matter.