JSFiddle - React, Tailwind, and code Playground

HTML

<html>
    <head>
        <meta charset="utf-8" />
        <title>web</title>
    </head>
    <body>
        <div class="back">
            Content.
        </div>
    </body>
</html>

CSS

.back {
    top: 50%;
    left: 50%;
    display: block;
    position: absolute;
    background: url('http://i.imgur.com/DkNND.png') no-repeat;
    background-size: 750px 417px;
    width: 750px;
    height: 417px;
    margin-top: -208.5px; /* HALF OF THE HEIGHT */
    margin-left: -375px; /* HALF OF THE WIDTH */
}