Edit in JSFiddle

.container {
	display: table;
	background: #7396a1;
	height: 100px;
    color: #fff;
    margin-left: auto;
    margin-right: auto;
}
.content {
	display: table-cell;
	vertical-align: middle;
    padding: 0 30px;
}

<div class="container">
	<div class="content">I'm aligned vertically!</div>
</div>