<!DOCTYPE html>
<html>
<head>
<title>Title of the document</title>
</head>
<body>
<svg>
<circle cx="50" cy="50" r="40" fill="blue" filter="url(#shadow)" />
<filter id="shadow">
<feDropShadow dx="2" dy="2" stdDeviation="2" />
</filter>
</svg>
</body>
</html>