JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">
<img src="http://img707.imageshack.us/img707/7361/du6s.jpg" />
   
    <div class="overlay"></div>    
</div>

CSS

.container{position:relative;}
.overlay{
    position:absolute;
    background:#ccc;
    width:100%;
    height:100%;
    top:0;
    z-index:999;    
}