For your standard professional tennis ball, the answer is yellow. To some, it may appear to have a slight greenish or neon tint, but for all intents and purposes, a tennis ball is yellow. Seems simple enough, right? If we were strictly talking about the professional tennis league, then that would be the end of the story. But did you know that there is an official color coding system for junior tennis? Parents wanting to get their kids started early on tennis may not realize that there is a robust system divided into stages. This system uses colored dots to designate the bounce speed and recommended age range of each ball and stage. Including the standard yellow tennis ball, there are 4 different colored tennis balls: red dot, orange dot, green dot, and yellow.
Red Dot (Stage 3 Players)
Red dot tennis balls are designed for the youngest player age group, ages 8 years and under. They're designed with a much lower bounce speed, making it easier to return and start a rally. For this reason, beginners of all ages can benefit from learning with red dot tennis balls, whether it's for developing reactions or simply getting used to hitting the ball back and forth. Besides being made with the typical felt material, softer foam red dot balls also exist. Foam balls are not only more durable than felt ones, but they're also safer to play with and make less noise, making them an attractive option for family-friendly fun.
| Age Group | 8 years and under |
| Bounce Speed | 75% slower |
| Court Size | 36ft x 18ft |
| Net Height | 2ft 9in |

Orange Dot (Stage 2 Players)
Orange dot balls are made for the next age group, kids 8-10 years old. They have a slightly faster bounce than red dot balls, and are accordingly designed to be played on a slightly larger court. Because of their medium bounce speed, orange dot balls are the official balls used in competitive beach tennis. Beach tennis, similar to volleyball or badminton, has a no-bounce rule, so a slower traveling ball is used in order to keep the game competitive and interesting.

| Age Group | 9-10 years old |
| Court Size | 60ft x 21ft |
| Bounce Speed | 50% slower |
| Net Height | 3ft |
Green Dot (Stage 1 Players)
The final junior stage tennis balls are green dot balls, designed for players 11 years and up. As this is the final stage before reaching the pro level, green dot tennis balls are made to play on full-sized tennis courts, albeit at a slightly slower speed compared to professional tennis balls.
| Age Group | 11+ years old |
| Court Size | 78ft x 27ft |
| Bounce Speed | 25% slower |
| Net Height | 3ft |

Why the Color Yellow?
You'll notice that there's one common denominator across all these types of tennis balls, and it's that they all have a yellow base. This bright coloration serves an important purpose: it ensures the ball is highly visible across all court surfaces, even at high speed, which is important for players and viewers alike.

