index.html

<!DOCTYPE html>
<head>
  <style>
    html,
    body {
      background-color: #777;
      box-sizing: border-box;
      margin: 0;
    }
    body {
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 20px;
    }
    div {
      margin: 20px;
    }
  </style>
</head>
<body>
  <div>
    <img src="out.png" />
    <p>out</p>
  </div>
  <div>
    <img src="last.png" />
    <p>last</p>
  </div>
  <div>
    <img src="keep.png" />
    <p>compare</p>
  </div>
</body>