Aside from one or two outliers, those who believe a tennis ball is yellow saw the dress as gold and white, while those who believe a tennis ball is green saw the dress as black and blue. Minds blown.

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.

“Asking if a tennis ball is one color or the other, yellow or green, is like having to decide if the ocean is green or blue," according to Behr paint color expert Erika Woelfel.

By rule of tennis law—specifically, the International Tennis Federation, or ITF—a tennis ball should be yellow in color.

Tennis balls didn’t get their distinctive neon hue until nearly a century after the game was invented.

If you hold a tennis ball up to something green, it looks more yellow, and if you hold it up to something yellow, it looks more green. Makes sense. No, but actually, what color are tennis balls?

What color are tennis balls? They all have another common characteristic: they share a color, called optical yellow, which in 1972 was adopted by the ITF - hence the 'age' of the current ball.

What color are tennis balls? A man asked Roger Federer are tennis balls green or yellow and his confident answer did not disappoint ...

New balls please! But what color should they be? And what part did Sir David Attenborough play in the development of the modern tennis ball?

What color is a tennis ball? Well, it depends what level of tennis you want to play. Tennis ball colors beyond yellow-green could help you get started.

Is a tennis ball green or yellow? TODAY’s Carson Daly shares what most viewers think, as well as the opinion of one very important tennis player, Roger Federer.

But is he the utmost authority on what color a tennis ball is? In an answer to one incredible fan’s question that should have ended the debate, Fed said that tennis balls are yellow.