<!doctype html>
<html>
<head>
<style>
#theDiv {
  height: 48px;
  background-color: lightgrey;
  box-shadow: black 0px 2px 4px;
  width: 200px;
  background-image: linear-gradient(red, green), linear-gradient(blue, cyan);
}
</style>
</head>
<body>
  <div id="theDiv"></div>
</body>
</html>