index.html

<!DOCTYPE html>
<html>
    <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Colored Markers</title>
    <link rel="stylesheet" type="text/css" href="styles.css">
    </head>
        <body>
            <h1>CSS Color Markers</h1>
            <div class="container">
                <div class="marker red">
                    <div class="cap"></div>
                    <div class="sleeve"></div>
                </div>
                <div class="marker green">
                    <div class="cap"></div>
                    <div class="sleeve"></div>
                </div>
                <div class="marker blue">
                    <div class="cap"></div>
                    <div class="sleeve"></div>
                </div>
            </div>
        </body>
</html>