JSFiddle - React, Tailwind, and code Playground

HTML

<div class="parent">
  <img src="http://www.gstatic.com/webp/gallery/1.webp" style="position: absolute; z-index: 2;" />
  <span class="overlay">OVERLAY</span>
</div>

CSS

.parent{
    position: relative;
    margin: 2em;
}

.parent img{
    position: absolute;
}

.parent .overlay{
    position: absolute;
    top: -1em;
    text-align: center;    
    width: 100%;
    background:#000;
}