What's in a name [of css color]?

While editing my site I found that there is a bit of conflict in color naming between CSS standard and the actual use of color names on the Web. Only 16 colors names are listed in official CSS specs, but actually more names are in use. Which brings a question: are you satisfied with 16 official CSS names and are you ready to resort to hex numbers (since we squiggle names like CadetBlue or Gainsboro in stylesheets) or do you want us to provide an option to relax validation and allow named colors which seem to be supported by IE as well as by Mozilla? We already allow them if target is IE6. Or will it be really wrong thing to do ?