#autoload

if (( ! $+_color_cache )); then
  local file

  # Cache of color names doesn't exist yet, create it.

  for f in /usr/{,local/,X11R6/,openwin/}lib/X11/rgb.txt
  do
    if [[ -f $f ]]; then
      file=$f
      break;
    fi
  done

  if [[ -n "$file" ]]; then
    _color_cache=( "${(@)${(@f)$(< $file)}[2,-1]##*		}" )
  else

    # Stupid default value.

    _color_cache=(white black gray red blue green)
  fi
fi

compadd - "$_color_cache[@]"