I immediate tried to find to find a script for Vim that does this, I found this: http://www.vim.org/scripts/script.php?script_id=2150

That script is in need of some serious optimization, it reduces load times for anything with CSS in it (read: any HTML page) to a 5-second plus wait.

Try it on a large HTML file.

You may be right but I haven't noticed any delays. Large files load pretty much instantly for me.

That's nice.

I use

  emacs -Q -f list-colors-display

to find out the color codes