CSS Colors

Name

Some 'original' color names in HTML: aqua, black, blue, fuchsia, gray, green, lime, maroon, navy, olive, purple, red, silver, teal, white, yellow

There are also Extended Color Keywords for CSS3, which are the same as SVG 1.0 colors (SVG is a type of image file format).

See also: CSS Tricks: Named Colors and Hex Equivalents

But, in general, avoid colors for real work!