Vulcan blood was green due to its being based on copper. (TOS: "Obsession" ) Green leafy vegetables were sometimes referred to simply as "greens." (TNG: "The Neutral Zone" ) In 2268, Montgomery Scott was at a loss to describe an alcoholic beverage to Tomar, and settled on "it's green." (TOS: "By Any Other Name" ) In 2367, while trying to choose clothing for her date with Timicin, Lwaxana Troi wondered aloud whether he liked green. (TNG: "Half a Life" ) In 2369, Data described Aldebaran whiskey to Scott as simply being green. (TNG: "Relics" )