Axis of the cones darkens or lightens the color.

All colors can be represented by three parameters in this model. The hue is the particular position of a color in the color wheel. Hues are often represented by angles, beginning with red at 0° and progressing around in a counterclockwise direction to magenta at 60°, blue at 120°, and so forth. The saturation of the color is the degree to which that color is diluted with white. A hue with a great deal of white is muted; a red becomes a pink, for example. A hue with very little or no white is vivid and saturated. Brightness can be thought of as the degree to which a color is diluted with black. Add black to our desaturated red (pink), and you'll get a very dark pink. Various combinations of hue, saturation, and brightness can be used to produce just about any color we can see. Individual hues can be found along the edges of the hexagon. Moving from that edge toward the center within the same plane indicates a color that is less saturated. The center of the hexagon represents zero saturation. The axis extending through the center of the hexcones represents lightness and darkness, with white at the top and black at the bottom of the line.

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