Eh, I forgot to add a couple of things, sorry for double-post.
( taken from starwars wikia )
Adult Sith characteristically had skin of a crimson-hue, although infants of the species appeared a lighter shade of red. However, even though typically a dark red, some members of the species retained more pink shades of skin tone in adulthood. Sith had sharp, fierce predatory profiles and features all over their bodies, including bone spurs protruding from under their skin at various locations like the elbows. Their faces also displayed a notable pair of cheek tendrils that hung down from their high cheekbones. Sith also had cranial horns, pointed teeth, simian mouths below their small noses, and glowing yellow eyes covered by cartilaginous eyebrow–stalks.
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