And you can change breadcrumb and color for header in this layout by run the command gulp nunjucks --layout default --beadcrumb * --color *
Copy <!DOCTYPE html>
<html lang="en">
<head>
<title>{{title}} | Rare admin</title>
<!--Start common styles-->
{% include "partials/head.html" %}
<!--End common styles-->
<!--Start page level styles-->
{% block header_styles %}{% endblock %}
<link type="text/css" rel="stylesheet" href="css/pages/dark_layout.css" />
<!--End page level styles-->
</head>
<body class="fixed_menu">
<!--Start heaader-->
{% include "partials/header.html" %}
<!--End header-->
<!--Start wrapper-->
<div class="wrapper">
<!--Start left menu-->
{% include "partials/leftmenu.html" %}
<!--End left menu-->
<div class="right-aside view-port-height">
<!--Start breadcrumb-->
{% include "macros/breadcrumb.html" %}
<!--End breadcrumb-->
<!--Start block content-->
{% block content %}{% endblock %}
<!--End block content-->
</div>
</div>
<!--End wrapper-->
<!--Start footer-->
{% include "partials/footer.html" %}
<!--End footer-->
<!--Start common scripts-->
{% include "partials/end.html" %}
<!--End common scripts-->
<!--Start page level scripts-->
{% block footer_scripts %}{% endblock %}
<script type="text/javascript" src="js/pages/fixed_menu.js"></script>
<!--End page level scripts-->
</body>
</html> 