Columbia, SC (WLTX)- The latest internet debate about the true color of tennis balls has some people fuzzy about whether they are yellow or green.
The whole debate started with a Twitter poll. Depending on who you ask, some people believe tennis balls are yellow, green, chartreuse, lime green or neon yellow.
The question was posed to the world's number one ranking men's tennis player, Roger Federer was asked to weigh in.
Federer said they are yellow in a video that has now gone viral.
So why do some people see different colors? The answer may lie in previous optical illusion that made waves online about that white and gold dress.
For the record most tennis ball manufacturers would agree with Federer, that tennis balls are in fact yellow.