JSFiddle - React, Tailwind, and code Playground

HTML

<div class="corner-bottom-right-bevel">
    <img src="http://ashiyane.org/forums/images/metro/blue/misc/vbulletin4_logo.png" alt=""/>
</div>

CSS

.corner-bottom-right-bevel {
    border-color: #333 transparent transparent;
    border-style: solid;
    border-width: 170px 100px 0 0;
    float: left;
    margin-top: -5px;
    width: 280px;
    overflow: hidden;
    height: 0;
}