colored ball
General term for any ball that is colored, such as toys, sports equipment, or decorative items.
The children are playing with colored balls in the park.
paintball; anti-thief colored ball
Specifically a ball filled with colored dye, used in security devices or paintball games. Often associated with anti-theft systems in banks or shops.
Colored balls are used in bank security systems.
He shot a paintball in the survival game.