Color in Information Display
Look around and consider what role color plays in the objectsyou see. I would argue that one of its primary purposes is toinform. Even in the natural world, color is a key way to tell if something is edible, dangerous, or one of a related set of objects. In the manufactured world, color is used extensively to label, to discriminate, to brand, or to otherwise identify objects and their components. It is an important part of illustration, cartography, and data presentation, from medical imaging to pie charts. This chapter describes the informative aspects of color in fields called visualization, information visualization, and illustration. Its principles also apply to the use of color in user-interface design.