Violacean

Violaceans are a sapient, spacefaring race of purple-skinned humanoids. Their homeworld is a member of the United Federation of Planets, having joined in or before the year 2268.

Appearances

 * Star Trek, s02e15, "Journey to Babel" (1967)
 * Star Trek IV: The Voyage Home (1986)
 * Star Trek VI: The Undiscovered Country (1991)
 * Star Trek Beyond (2016)