HTML

<a href="#" title="LinkedIn" class="btn btn-linkedin btn-lg"><i class="fa fa-linkedin fa-fw"></i> LinkedIn</a>

CSS

.btn-linkedin {
	  background: #0E76A8;
	  border-radius: 0;
	  color: #fff;
	  border-width: 1px;
	  border-style: solid;
	  border-color: #084461;
	}
	.btn-linkedin:link, .btn-linkedin:visited {
	  color: #fff;
	}
	.btn-linkedin:active, .btn-linkedin:hover {
	  background: #084461;
	  color: #fff;
	}