JSFiddle - React, Tailwind, and code Playground

HTML

<div class="center">
	<p class="text">This is text that should be in the center of the block vertically and horizontally</p>
</div>

CSS

.center {
		background: url('http://www.fnordware.com/superpng/pnggrad8rgb.png');
		-webkit-align-items: center;
		-webkit-justify-content: center;
		align-items: center;
		display: -webkit-flex;
		display: flex;
		height: 300px;
		justify-content: center;
		width: 300px;
	}