Can't seem to troubleshoot why my icons are displaying as white icons instead of their proper colors. Despite changing 'fab' to 'fa', the issue persists. Has anyone else encountered this problem while working with Font Awesome?
* {
font-family: 'Open Sans', sans-serif !important;
}
<link href="https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet" integrity="sha384-wvfXpqpZZVQGK6TAh5PVlGOfQNHSoD2xbE+QkPxCAFlNEevoEH3Sl0sibVcOQVnN" crossorigin="anonymous">
<ul>
<li><a><i class="fas fa-facebook"></i></a></li>
<li><a><i class="fas fa-twitter"></i></a></li>
<li><a><i class="fab fa-youtube"></i></a></li>
<li><a><i class="fab fa-instagram"></i></a></li>
</ul>