Tieflings are the product of fallen celestials and mating with mortals. They are derived from Human bloodlines and in the broadest possible sense still look Human. However, their infernal heritage has left a distinct imprint on their appearance. Tieflings have large horns that take on different shapes: some have curly horns like a ram's, others have straight and long horns like those of a gazelle, and some spiral up like the horns of an antelope. They have thick tails, four to five feet long, that lash or wrap around their legs when they get upset or nervous. Their fangs are sharply pointed and their eyes are solid in color - black, red, white, silver or gold - with no visible sclera or pupil. Their skin tones cover the full range of Human coloring, but also include various shades of red. Their hair, which falls down from behind their horns, is usually dark, ranging from black or brown to dark red, blue or purple.