Font Awesome Circle Background

HTML

<link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/font-awesome/4.2.0/css/font-awesome.min.css">
<span class="fa-stack fa-xs">
  <i class="fa fa-circle fa-stack-2x icon-background2"></i>
  <i class="fa fa-times fa-stack-1x"></i> 
</span>

CSS

.icon-background2 {
    color: blue;
}

.fa-times {
  color:pink;
}