Instructions
Improve your performance in the game you are playing. One of the factors of the color of your PlayStation Move sphere is how well you perform in a game, as a form of feedback.
Change the game you are playing. Because there is no default color, some games will cause the sphere to change to a different color than others.
Change your environment, which is another factor in sphere color. For example, if you have many colorful items near your gaming environment, you can move them out of the way to alter the environment. The sphere will change color to avoid conflicting with your environment, so changing it will open new options.
Calibrate your Move controller again. Calibrating your controller takes your new environments into consideration, picking a color upon completion until you begin playing a new game.