<p>
    This:
</p>
<div style="margin: 40px; background: green; -webkit-border-radius: 40px; width: 60px; height: 60px; -webkit-box-shadow: black 10px 10px 0;"></div>
<p>
    Should look like this:
</p>
<div style="margin: 40px; background: green; width: 60px; height: 60px; -webkit-box-shadow: black 10px 10px 0;"></div>