Untitled

<html>
<head>
  <style>
    .test {
      border-left: 5px solid green;
      border-right: 5px solid blue;
      border-bottom: 5px solid magenta;
      height: 100px;
      width: 100px;
      background: orange;
     }

  </style>
</head>
<body>

<div class="test">foo</div>

</body>
</html>