<!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>