JSFiddle - React, Tailwind, and code Playground

HTML

<div class="shape">
	<i class="b1"></i>
	<i class="b2"></i>
</div>

CSS

.shape
{
	width: 100px;
	height: 50px;
	margin: 0 auto;
	background-color: #3F7296;
	position: relative;
	color: #FFF;
	line-height: 50px;
	font-size: 40px;
}
.b1, .b2
{
	position: absolute;
	left: 100px;
	bottom: 0px;
	width: 0px;
	height: 0px;
	border-style: solid;
	border-width: 0px 0px 50px 16px;
	border-color: transparent transparent transparent #3F7296;
}

.b2
{
	left: -16px;
	border-width: 50px 16px 0px 0px;
	border-color: transparent #3F7296 transparent transparent;
}