CSS3 border-radius - To: CSS3 - Information and samples

Code used in this page

.rounded-corners {
	width: 100px;
	height: 100px;
	color: #fff;
	background: #f00;
	padding: 10px;
	
	/* Firefox */
	-moz-border-radius: 5px; 
	/* WebKit */
	-webkit-border-radius: 5px; 
	/* IE9, Opera 10.5+, dev channel releases of Google Chrome */
	border-radius: 5px; 
}