open_in_new content_copy 
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        h1{
            background-color: black;
            color: bisque;
        }
    </style>
</head>
<body>
     <div>
        <h1> This is internal CSS</h1>
     </div>
</body>
</html>