<!DOCTYPE html>

<html>
<head>
  <title>CSS Reftest Reference: flex order</title>
  <link rel="author" title="Mitsuteru Sawa" href="mailto:mitsuteru.s@gmail.com">
  <style>
    #container { display: flex; }
    #highOrdinal {
      background: lime;
      height: 100px; width: 100px;
    }
    #middleOrdinal {
      background: orange;
      height: 100px; width: 100px;
    }
    #lowOrdinal {
      background: red;
      height: 100px; width: 100px;
    }
  </style>
</head>
<body>
  <div id="container">
    <div id="highOrdinal"></div>
    <div id="middleOrdinal"></div>
    <div id="lowOrdinal"></div>
  </div>
</body>
</html>