a
chart showing a continuous circle of colors, normally consisting of twelve hues (
yellow,
yellow-
orange,
orange,
red-
orange,
red,
red-violet, violet, blue-violet, blue, blue-
green,
green,
yellow-
green). The
sequence of colors is that of the rainbow or natural
spectrum, and their
relative positions on the circle are used in determining types of
color harmonies. See diagram below.