JSFiddle - React, Tailwind, and code Playground

HTML

<div class="cont">
    <img src="http://www.quarktet.com/Icon-small.jpg" />
</div>

CSS

.cont {
    background-color: grey;
    position: fixed;
    height: 100%;
    width: 100%;
    display: table;
}
img {
       display: table-cell;
    vertical-align: middle;
}