JSFiddle - React, Tailwind, and code Playground

by Igaojsfiddle

HTML

<div id="hexagon"></div>

CSS

#hexagon {
	width: 50px;
	height: 55px;
	background: red;
	position: relative;
}

#hexagon:after {
	content: "";
	position: absolute;
	bottom: -25px;
	left: 0;
	width: 0;
	height: 0;
	border-left: 25px solid transparent;
	border-right: 25px solid transparent;
	border-top: 25px solid red;
}