JSFiddle - React, Tailwind, and code Playground

HTML

<div class="transparent">
    <img src="http://lorempixel.com/400/200">
</div>

CSS

.transparent {  
    filter: alpha(opacity=50); /* internet explorer */  
    -khtml-opacity: 0.5;      /* khtml, old safari */  
    -moz-opacity: 0.5;       /* mozilla, netscape */  
    opacity: 0.5;           /* fx, safari, opera */  
}