), rgb(), rgba(), cmyk(), cmyka(), hsl(), hsla(), etc.</dd>
  <dt class="col-md-4"> color hex values:</dt>
    <dd class="col-md-8"> #ccc, #cbfed0, #b9e1cc00, etc.</dd>
  <dt class="col-md-4"> symbols:</dt><dd class="col-md-8"><dl>
     <dd><samp>u</samp>: first image in list</dd>
     <dd><samp>v</samp>: second image in list</dd>
     <dd><samp>s</samp>: current image in list (for %[fx:] otherwise = u)</dd>
     <dd><samp>t</samp>: index of current image (s) in list</dd>
     <dd><samp>n</samp>: number of 