A harmonious design incorporates both positive and negative shape. However, our investigation of line will focus on outline. Artists use outline to flatten images. Outline can vary in width, and follows the shapes of the design. Adding white or black to a hue can change values.
Light values pop forward Dark values recede.
Hue is the name given to a color, such as red or blue. Hues used together are color schemes. The choice of a color scheme will effect the mood of the design. This color scheme involves the use of a range of values of a single color. This color scheme involves the use of related hues.