Type colorname, where colorname is one of the 16 predefined colors (see page 126 and the inside back cover).
Or type #rrggbb, where rrggbb is the color's hexadecimal representation.
Or type rgb(r, g, b) where r, g, and b are integers from 0255 that specify the amount of red, green, or blue, respectively, in the desired color.
Figure 10.24. The headers are navy blue, the text is light purple, and the links are dark purple, but turn lighter after being visited, and dark purple again when hovered over.
Or type rgb(r%, g%, b%) where r, g, and b give the percentage of red, green, and blue, respectively, in the desired color.