Colour Of Tennis Balls?

[Cloverjo]

Apparently, this question went viral on social media recently, with people arguing about whether the tennis balls used in top tournaments are yellow or green.
I'd be interested to know what you all think here.

I say yellow. What do you say?

[sunny-dave]

Yellow

[Mamyalynne]

Optic Yellow.

[Lie-in King]

Yellow

[sunny-dave]

https://store.slazenger.com/slazenger-wimbledon-ball-745053?colcode=74505313

[Buenchico]

The rules of the Internation Tennis Federation permit only either white or yellow balls to be used in adult competitions. (In practice, yellow balls are used for televised event because they're easier for the cameras to pick up on).

http://www.itftennis.com/technical/publications/rules/balls/appendix-i.aspx

[Mamyalynne]

https://www.thesun.co.uk/living/3964144/this-is-surprising-reason-why-wimbledon-tennis-balls-are-yellow-and-how-they-were-very-nearly-neon-pink/