Why Are Golf Balls Numbered. Its been found that at distances over 250 yards the human eye can see yellow colored balls more effectively than any other colored golf ball. In fairness the all.

Red being 90 Compression and Black being 100 Compression. The USGAs official response. Those days are long gone.
For a premium price other ball number options are all one number between one and nine and double digit.
The red often mean it is a softer golf ball. Golfers were led to believe that they needed to play certain compressions based on temperatures. The number on a golf ball exists so that people know the difference between their balls because golf balls can be indistinguishable. Its been found that at distances over 250 yards the human eye can see yellow colored balls more effectively than any other colored golf ball.