JSFiddle - React, Tailwind, and code Playground

HTML

<div class="yellow">
		<div class="grey">
      <p>Lorem Ipsum</p>
    </div>
	</div>

CSS

body {
  background : #ccc;
}
div.grey {
  display:inline-block;
  height: 100%;
  background : #ccc;
}
div.yellow {
    background: yellow;
}