get Background color

getCurrentBG.js

getComputedBG = function (elem) {
  var rtn = window.getComputedStyle(elem)['background-color'],
    element = elem,
    isTransparent = function (color) {
      return color === 'rgba(0, 0, 0, 0)' || color === 'transparent'
    };

  while (element !== null && isClear(rtn)) {
    element = element.parentElement;
    rtn = window.getComputedStyle(element)['background-color'];

    if (!isTransparent(rtn)) {
      break;
    }
  }

  return rtn;
};

this should end up in belt eventually...