Black magic represents the magic of death. Powers of the blue magician are artifice, illusion, and deception. It is mental in nature. Green magic is the magic of life. It has a peaceful exterior, but has vast destructive capability.
Red magic is the magic of earth, fire, chaos, and of war.
Its tendencies are also destructive. Spells of healing and protection are the white magician's specialty. Magic players will argue that it is harmless fun. However, its addictive nature can lead one to deprioritize his or her involvement in school, family, church, or other activities in order to have time for Magic. And don't think the producers aren't well aware of its addictiveness.