JSFiddle - React, Tailwind, and code Playground

HTML

<img src="http://upload.wikimedia.org/wikipedia/en/2/24/Lenna.png" />
<div></div>

CSS

div {
    margin:auto;
    width: 512px;
    height: 512px;
    background: rgba(0,0,0,.4);
    position: relative;
}
img {
    position: absolute;
    left: 50%;
    margin-left:-256px;
}