code: function(theDiv, newColor) {
     
          theDiv.style.backgroundColor = newColor;
  
          var spanElements = theDiv.parentNode.getElementsByTagName("span");
          
          for (var currIdx = 0; currIdx < spanElements.length; currIdx++) {
              spanElements[currIdx].style.backgroundColor = newColor;
          }
      }
docs: This is a helper function to change the background
  color of <div> that has had Rico rounded corners added.
  
  It seems we cannot just set the background color for the
  outer <div> so each <span> element used to create the
  corners must have its background color set individually.
  
  @param {DOM} theDiv - A child of the outer <div> that was
  supplied to the `round` method.
  
  @param {String} newColor - The new background color to use.