You define colors in HTML and CSS using either a color name or a color
value. HTML supports list of sixteen basic color names. CSS supports this list as
well and adds the color name orange. Most browsers
also support an extended set of 140 color names. The following table lists these extended
color names, along with RGB and hexadecimal values for each color. The sixteen color names
supported by CSS are highlighted in the table.
GIF images and some older monitors are limited
to 256-color displays. To approximate the full palette colors, GIFs and these older monitors
will use a process called dithering. To avoid dithering you should limit your
colors to a subset of colors called Web-safe colors. The Web-safe colors from the
extended color list are displayed in a
bold font.