Header Template HTML - Warning

<!-- Navbar Wrapper - Fixed Version -->
<header class="navbar bg-warning navbar-fixed-top">

    <!-- Navbar Branding. Take note of the ".dark" after ".bg-warning" -->
    <div class="navbar-branding bg-warning dark"> ... </div>

</header><!-- End Navbar Wrapper -->

Note: This HTML only shows what bg classes are required. More HTML is required to create menus. See this example for a full header html template