JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container"><div></div></div>

CSS

html, body {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
}

body {
    display: table;
}

.container {
    display: table-cell;
    vertical-align: middle;
    border: 1px solid #f00;
}

.container > div {
    width: 100%;
    height: 100%;
    margin: 0 auto;
    border: 1px solid #00f;
    max-width: 550px;
    max-height: 480px;
    background: url("http://dummyimage.com/550x480/000/fff?text=H/V Centered and height/width variable") 50% 50% no-repeat;
    background-size: contain;
}