Table of the 216 usual colors and their "#RRGGBB" values
(Source: The JavaScript Source)

Standard 216 Color Palette
Houser's RGB2HEX DHTML App
Red Green Blue

NOTE: Click on any item of the pallet of the 216 colors to obtain the specific values
                 of the triplet (R, G, B) [Red, Green, Blue] and the hexdecimal code associated with item.