# color wheel 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 the 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. yellow yellow yellow-orange green range blue-green red-orange blue d blue-vi d-violet violet