Simplex

by Bootswatch

HTML

<link rel="stylesheet" href="https://bootswatch.com/4/simplex/bootstrap.min.css">
<script src="https://bootswatch.com/_vendor/jquery/dist/jquery.min.js"></script>
<script src="https://bootswatch.com/_vendor/bootstrap/dist/js/bootstrap.bundle.min.js"></script>
<h1>Simplex</h1>
<div>
    <a href="#" class="btn btn-primary">Primary</a>
    <a href="#" class="btn btn-secondary">Secondary</a>
    <a href="#" class="btn btn-success">Success</a>
    <a href="#" class="btn btn-info">Info</a>
    <a href="#" class="btn btn-warning">Warning</a>
    <a href="#" class="btn btn-danger">Danger</a>
</div>