Black magic is the type of magic

Magic (paranormal)

Magic is the claimed art of manipulating aspects of reality either by supernatural means or through knowledge of occult laws unknown to science. It is in contrast to science, in that science does not accept anything not subject to either direct or indirect observation, and subject to logical...

 that draws on assumed malevolent powers or is used with the intention to kill, steal, injure, cause misfortune or destruction, or for personal gain without regard to harmful consequences. As a term, "black magic" is normally used by those that do not approve of its uses.

A rather different view on Black Magic is used in the system of Chaos magic

Chaos magic

Chaos magic is a school of the modern magical tradition which emphasizes the pragmatic use of belief systems and the creation of new and unorthodox methods.-General principles:...

. In this branch of occult practice, spells sometimes correspond to colors, depending on the supposed effect (e.g., red magic, which is magic concerned with combat, such as low-level curses).