JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css">

<span class="glyphicon glyphicon-play">
    <span class="inside glyphicon glyphicon-play"></span></span>

CSS

span{
    font-size: 60px;
    color:red;
   
}

span.inside{
    position:round;
    font-size: 55px;
    color:black;
    left:3px;
    top:2px;
}