.social-roll {
	background-image: url('path/to/gray/image.png');
	height: 48px;
	width: 48px;
	margin: 10px;
	float: left;
	border-radius: 50%;
	-webkit-transition: all ease 0.3s;
	-moz-transition: all ease 0.3s;
	-o-transition: all ease 0.3s;
	-ms-transition: all ease 0.3s;
	transition: all ease 0.3s;
}
.social-roll:hover {
	background-image: url('path/to/color/image.png');
	box-shadow: 0px 0px 4px 1px rgba(0,0,0,0.8);
	-webkit-transform:rotate(360deg);
	-moz-transform:rotate(360deg);
	-o-transform:rotate(360deg);
	-ms-transform:rotate(360deg);
	transform:rotate(360deg);
}