Here is the solution for you.
VIEW DEMO
The CSS Modification:
div{background: #264a75; /* Previous browser support */
background: -moz-radial-gradient(center, ellipse cover, #264a75 2%, #4176b6 100%); /* Firefox 3.6+ */
background: -webkit-gradient(radial, center center, 0px, center center, 100%, color-stop(2%,#264a75), color-stop(100%,#4176b6)); /* Chrome & Safari 4+ */
background: -webkit-radial-gradient(center, ellipse cover, #264a75 2%,#4176b6 100%); /* Chrome 10+ & Safari 5.1+ */
background: -o-radial-gradient(center, ellipse cover, #264a75 2%,#4176b6 100%); /* Opera 12+ */
background: -ms-radial-gradient(center, ellipse cover, #264a75 2%,#4176b6 100%); /* Internet Explorer 10+ */
background: radial-gradient(ellipse at center, #264a75 2%,#4176b6 100%); /* W3C standard */
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#264a75', endColorstr='#4176b6',GradientType=1 ); /* IE gradient fallback */ width:300px; height:150px; border:3px solid #385d8a;}
I trust this meets your requirements.