En externe
<link type="text/css" href="./mystyle.css" />
En interne
<head>
<style type="text/css">
hr {color:sienna;}
p {margin-left:20px;}
body {background-image:url("images/back40.gif");}
</style>
</head>
En ligne
<p style="color:blue;margin-left:20px;">This is a paragraph.</p>
