The DitherPicker was developed to aid icon designers by displaying a range of dithered patterns created from two solids you choose from the recommended palette of 34 colors. By using these dithered patterns, the perceived number of colors that is available to icon designers is immensely expanded. One of the most difficult issues in computerbased publishing is color accuracy. The color models discussed in the previous section, RGB and HSB, are directly tied to the display device. These models are strongly devicedependent.
Many color models are inherently device dependent.
Output devices such as display screens have different responses to the same color levels. Go into any store with a wall full of televisions for sale, all tuned to the same station, and you'll observe the differences. A number of efforts at accurate, deviceindependent color display and control are impressive. However, the quest for accurate color display and printing is not yet over. Printing Color Models Several color models have evolved for use in printing.