<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<button class="btn-primary-green-on-white coE-button"> Primary Green on White</button>
<button class="btn-secondary-green-on-white coE-button"> Secondary Green on White</button>
<button class="btn-primary-green-on-dark coE-button"> Primary Green on Dark</button>
<button class="btn-primary-white-on-dark coE-button"> Primary White on Dark</button>
<button class="btn-secondary-green-on-dark coE-button"> Secondary Green on Dark</button>
<button class="btn-secondary-white-on-dark coE-button"> Secondary White on Dark</button>
