alt Hacker NewsWhat do you mean tennis balls are yellow? I always thought they were green? https://en.wikipedia.org/wiki/Tennis_ball#/media/File:Closeu...
What do you mean tennis balls are yellow? I always thought they were green? https://en.wikipedia.org/wiki/Tennis_ball#/media/File:Closeu...
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They're officially yellow. Many people (~50% in my experience) perceive this colour as green though.
> Tennis balls are fluorescent yellow in professional competitions
https://en.wikipedia.org/wiki/Tennis_ball