The web-smart palette uses a 16-by-16-by-16 cube of 4,096 colors. The web-smart palette uses any combination of 00, 11, 22, 33, 44, 55, 66, 77, 88, 99, aa, bb, cc, dd, ee, and ff, and provides a more complete gamut that should display consistently on monitors that support thousands (16-bit) and millions (24-bit) of colors. Most of the colors should dither to the nearest browser-safe color on 256-color monitors.
There are several ways to view the palette:
Note: Many of the colors in the web-smart palette will not display accurately or consistently on 256-color monitors, and you should only use colors from the palette if you know most of your users have monitors that support at least 16-bit color (thousands of colors). Also, many of the web-smart colors are visually equivalent to nearby colors in the traditional 216-color browser-safe palette, so you should use the browser-safe color in those cases.