JSFiddle - React, Tailwind, and code Playground

HTML

<div>
<a href="someaddress"><img class="thumb" src="http://www.google.co.in/images/srpr/logo4w.png"/></a>
</div>

CSS

img.thumb {
    position:relative;
    top:0px;

}

img.thumb:hover {
    position:relative;
    top:5px;    
    background:#00CCCC;

}