<!doctype html>
<head>
  <meta charset="utf-8">
  <title>Manifest successful load with a warning</title>
  <link rel="manifest" href='data:application/manifest+json,{"name": "Foo", "background_color": 42}'>
</head>
<body>
<h1>Manifest OK with validation warnings</h1>
<p><code>background_color</code> does not contain a valid CSS color.</p>
</body>