What color is a tennis ball? I asked a scientist. - SBNation.com
What color IS a tennis ball? Internet divided over yellow or green hue as debate sparks on social media - and even Roger Federer has weighed in | Daily Mail Online
So my girlfriend just told me that tennis balls are green not yellow and now my mind is blown. : r/ColorBlind
High Elastic Multi purpose Rubber Tennis Beginners - Temu
Why Tennis Balls Are Yellow—or Maybe Green | Artsy
What Color Is a Tennis Ball? - The Atlantic
Are tennis balls yellow or green? | dot color
Hugh M. Cunningham Companies - The latest internet color debate...are tennis balls green or yellow?? | Facebook