I had friends who had a red VW and were in New York City when the circus was in town. They were stopped near the circus and an elephant was by their car and it had been trained to put his/her foot on something red. Yes, the elephant put it's foot on the front fender.
Elephants are colorblind!
They can see the hues blue and yellow, but they are unable to distinguish between red and green.
Regards,