JSFiddle - React, Tailwind, and code Playground

HTML

<h2>Das ist die Titel Zeile</h2>

CSS

h2{	
    font-weight:bold; 
	font-size: 22px;
	border-bottom: 1px solid #C0C0C0;
	padding:0 0 10px 0px;
	margin: 0 0 30 30px;
	}	
	

h2:before{ 
	content: ' '; 
	position: absolute; 
    bottom:0;
	top:52px;
	left:230px;
	border: 15px solid #6E6E6E; 
	border-right-color:  transparent;
	border-bottom-color: transparent;
	border-left-color:   transparent;
	}