UNIX versions of browsers use a different color palette than the Windows and Macintosh versions. The system color picker is not limited to web-safe colors. To select a color outside the web-safe range, open the system color picker by clicking the Color Wheel button in the upper-right corner of the Dreamweaver color picker. The Color Cubes (default) and the Continuous Tone palettes in Dreamweaver use the 216‑color web-safe palette selecting a color from these palettes displays the color’s hexadecimal value. Many of these devices offer only black and white (1‑bpc) or 256 color (8‑bpc) displays. One reason to use the web-safe color palette is if you are developing for alternative web devices such as PDA and cell phone displays.
Today, the majority of computers display thousands or millions of colors (16‑ and 32‑bpc), so the justification for using the browser-safe palette is greatly diminished if you are developing your site for users with current computer systems. When web browsers first made their appearance, most computers displayed only 265 colors (8 bits per channel (bpc).
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Testing, however, reveals that there are only 212 web-safe colors rather than a full 216, because Internet Explorer on Windows does not correctly render the colors #0033FF (0,51,255), #3300FF (51,0,255), #00FF33 (0,255,51), and #33FF00 (51,255,0). The conventional wisdom is that there are 216 common colors, and that any hexadecimal value that combines the pairs 00, 33, 66, 99, CC, or FF (RGB values 0, 51, 102, 153, 204, and 255, respectively) represents a web-safe color. A web-safe color is one that appears the same in Safari and Microsoft Internet Explorer on both Windows and Macintosh systems when running in 256‑color mode. In HTML, colors are expressed either as hexadecimal values (for example, #FF0000) or as color names ( red).
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