Untitled

<DOCTYPE html>
<html>
    <head>
            <style type="text/css">

            div
            {
                width: 200px;
                border: solid 4px blue;
                background-color: #0000aa;
                color: white;
                padding: 20px;
                text-align: center;
                font-size: 24px;
                margin-right: auto;
                margin-left: auto;
                margin-top: 100px;

            }

            </style>
    </head>
    <body>
        <div>Najedz na mnie!</div>
    </body>
</html>