JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>

<div class="img-wrap">
    <img src="http://mikecane.files.wordpress.com/2007/03/kitten.jpg" />
</div>

CSS

.img-wrap {
    background: black;
    display: inline-block;
    line-height: 0;
}
    .img-wrap > img {
        opacity: 0.8;
    }