Being a stickler about color theory, I keep trying to get people to say that tennis balls are chartreuse, but I don't have a lot of luck: https://en.wikipedia.org/wiki/Chartreuse_(color)

To me, calling that color "yellow or green" is like trying to use the words "red or yellow" to describe orange.

They look more like yellow than chartreuse to me. Colour names are all opinion - not much point arguing about it or trying to convince anyone of your opinion.