Spock's alien origin wouldn't have been complete without his blood having a different color - at least as far as TV tropes go. What color was Spock's blood?

Leonard "Bones" McCoy, USS Enterprise's doctor, once referred to Spock as a "green-blooded bastard". And he was being quite literal - unlike humans, Vulcans' blood is copper-based and not iron-based, resulting in the signature green color.

Asked by Vasilii Kulev · Last updated 5 years ago · 151.2K views · SOURCE