What Color Are Tennis Balls?
Tennis balls are optic yellow — a fluorescent shade that sits right on the border between yellow and green, which is why so many people argue about it. The International Tennis Federation approves exactly two colors for standard match balls: white or yellow. Optic yellow became the standard in 1972, and Wimbledon was the last major tournament to give up white, holding out until 1986.
The rest of this article is the story of how that happened, and why a natural history broadcaster is the reason your tennis balls are not white.
You know him as the voice of the natural world, but did you know that Sir David Attenborough also played a key role in changing the color of tennis balls? It's true! The world-famous broadcaster helped usher in the era of the vibrant yellow tennis balls we see today.
Before the 1970s, tennis balls were traditionally white. But with the rise of color television, a young David Attenborough, then a BBC television executive, recognized a problem: white tennis balls were often difficult to see against the grass courts of Wimbledon, making it hard for viewers at home to follow the action.
Attenborough, always a champion of innovation, proposed a solution: color tennis balls. He believed that brightly colored fluorescent balls would be more visible on screen, improving the viewing experience for audiences.
The International Tennis Federation (ITF) took his suggestion to heart and conducted extensive research to find the optimal color for good tennis balls. They needed a shade that would be easily visible on both color and black-and-white televisions, and against different court surfaces.
Their research led them to fluorescent yellow, a color that provided the best visibility and contrast. Soon, players were serving up optic yellow tennis balls, forever changing the look of the game.
Ironically, Wimbledon, the tournament that inspired the change, was the last to adopt the yellow ball, sticking with tradition until 1986.
From white to optic yellow
Before 1972 — white. The standard for roughly the first century of the game.
1972 — the ITF approves yellow. Adopted after research into what would read clearly on colour television.
1986 — Wimbledon switches. The tournament that prompted the change was the last major to make it.
Today — optic yellow everywhere. White is still legal under the ITF specification, and starting to reappear.
Today, the yellow tennis ball is a global standard, used in professional tournaments and recreational play worldwide. So the next time you see a yellow tennis ball flying across the court, remember the surprising role Sir David Attenborough played in its history.
Yellow or Green? Why Nobody Can Agree
Optic yellow is a fluorescent color, and that is the root of the confusion. The pigment absorbs ultraviolet and short-wavelength light and re-emits it further down the spectrum, in the yellow-green band. In that band the ball gives back more visible light than it receives, so it reads brighter than whatever is behind it — which was the entire point of choosing it — and it lands on the one boundary where people's color naming genuinely splits.
The argument surfaces publicly every few years. In March 2018, during a visit to Chicago, a fan put the question to Roger Federer directly: green or yellow? He answered "They're yellow." It settled nothing.
The largest public count on record backs him, but not overwhelmingly. A YouGov survey of 9,166 US adults in July 2023 came out 55% yellow, 38% green and 7% unsure. Officially Federer is right, the ITF rulebook recognizes white and yellow and nothing else, and every manufacturer calls the shade optic yellow. That still leaves roughly four people in ten who look at the same ball and see green.
Do Tennis Balls Have to Be Yellow?
No. The ITF ball specification permits white or yellow for every standard approved ball — Type 1, Type 2, Type 3 and high altitude — so a white ball is exactly as legal today as it was before 1972. What changed in the seventies was television, not the rulebook. (The red, orange and green balls used for junior stages are a separate category with their own rules.)
White balls have started to reappear, and white padel balls along with them, a sport that never had a color standard to break in the first place. Our guide to white tennis balls and white padel balls covers where they are turning up and why.
Color is also the one thing about a ball that is genuinely standardized. Almost everything else a player cares about — how a ball is built, what it costs, how long it lasts — varies from tin to tin, which is the subject of our guide to tennis ball types, costs and lifespan.
The Story Didn't End With the Color
A tennis ball has never been a fixed object. It was white for the first century of the game, then yellow because television needed it to be, and the rulebook still permits both. The most recent change is not to the color at all.
A ball starts losing pressure the moment the can is opened, whether anyone plays with it or not. It is the same physics that made the ball a sealed pressurized object in the first place, running quietly in reverse, and for most of the sport's history it was simply the end of the ball. Unlike the color, that part can be put back.
That is the current chapter, and it is a smaller story than the first one: no committee, no rule change, just a container that holds the ball at pressure between sessions. How an automatic ball pressurizer works covers the mechanism, and ball charger, ball pressurizer or ball saver untangles the three names the category goes by — including what these devices cannot fix, which matters as much as what they can.
Tennis Ball Color: Common Questions
Why are tennis balls yellow?
Because of colour television. White balls were hard to follow on screen against grass, so the ITF researched a more visible shade and approved fluorescent yellow in 1972. The change was driven by broadcasting, not by players.
What color is a tennis ball?
Optic yellow — a fluorescent yellow-green. It is the only color you will see in professional play, though the rules permit white as well.
Are tennis balls green or yellow?
Officially yellow. Optic yellow sits on the yellow-green boundary — sampled from a photograph, the felt measures around hue 77°, where pure yellow is 60° and pure green is 120°. A YouGov survey of 9,166 US adults split 55% yellow, 38% green, 7% unsure.
When did tennis balls become yellow?
The ITF approved yellow in 1972. Wimbledon carried on with white until 1986, so the two colors overlapped for fourteen years.
Did tennis balls used to be white?
Yes, for roughly the first century of the game. White is still legal under the ITF specification and is starting to reappear.
Who made tennis balls yellow?
No single person. David Attenborough, then a BBC executive, pushed for a more visible ball for color television; the ITF ran the research that settled on fluorescent yellow.
What is optic yellow?
The manufacturers' name for the standard shade. It is fluorescent, meaning it re-emits light in the yellow-green band and appears brighter than its background.
How long do tennis balls last?
Less time than most players assume, and the color has nothing to do with it. A ball begins losing pressure as soon as the can is opened, and pressure, felt wear and the rubber itself decide the rest. How long you can keep playing with the same balls looks at what actually changes, and tennis ball pressurizers are the equipment built around the pressure half of the problem.
