Try this:
CSS:
.outer{
width: 100px;
height: 100px;
border: 1px solid black;
background: url(http://us.123rf.com/400wm/400/400/prolific/prolific1206/prolific120600020/14161811-pencil--edit--icon.jpg);
background-size: 100px 100px;
}
.num_notifs {
border-radius: 5px;
width: 50%;
margin-left: 25%;
margin-top: 2px;
background: #00b7ea; /* Old browsers */
background: -moz-linear-gradient(top, #00b7ea 0%, #0052bf 100%); /* FF3.6+ */
background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#00b7ea), color-stop(100%,#0052bf)); /* Chrome,Safari4+ */
background: -webkit-linear-gradient(top, #00b7ea 0%,#0052bf 100%); /* Chrome10+,Safari5.1+ */
background: -o-linear-gradient(top, #00b7ea 0%,#0052bf 100%); /* Opera 11.10+ */
background: -ms-linear-gradient(top, #00b7ea 0%,#0052bf 100%); /* IE10+ */
background: linear-gradient(to bottom, #00b7ea 0%,#0052bf 100%); /* W3C */
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr="#00b7ea", endColorstr="#0052bf",GradientType=0 ); /* IE6-9 */
text-align: center;
}
HTML:
<div class="outer">
<div class="num_notifs">
4329
</div>
</div>
solved CSS3 – box with notification bubble [closed]