body {
      background-color: white;
  }
  div.center {
      /* This places the containing block relative to the screen */
      position: absolute;
      top:  50%;
      left: 50%;
      background-color: #aab;
  }
  img {
      border: solid blue 1px;
      position: relative;
      top:  -50px;
      left: -60px;
  }