Color is an extremely powerful tool for encoding web pages with information. The near universality of color graphics on Internet-enabled computer workstations means that color is a viable design tool. At the same time, there are restrictions on the use of color. Not only is the range (gamut) of colors which computer monitors capable of producing only a small subset of the range which humans' can perceive, but the colors which can be safely used in web pages is even smaller. In addition, the use of color to specifically code controls or information dictated by principles of perception, cognition, and human performance. When used intelligently, color can greatly enhance web site usability.

Color perception and color systems

Background-foreground discrimination

Side-by-side discrimination

Size/resolution effects on discrimination

Perceptual/cognitive conflict



Pages created by Eric Wiebe. rev 11/7/98