<html lang="en">
<head>
<meta name="viewport" content="width=device-width;initial-scale=1.0">
<title>Demo</title>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@freshui/freshui/css/fresh-ui.min.css">
</head>
<body>
<button class="btn btn-dark">This is a dark button</button>
</body>
</html>
<head>
<meta name="viewport" content="width=device-width;initial-scale=1.0">
<title>Demo</title>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@freshui/freshui/css/fresh-ui.min.css">
</head>
<body>
<button class="btn btn-dark">This is a dark button</button>
</body>
</html>
And you are done with the starter template.