<html>
<head>
<style>
ol { counter-reset: item; }
ol li { display: block; }
ol li:before {
content: counter(item) ". ";
counter-increment: item;
color: red;
}
</style>
</head>
<body>
<ol>
<li>item</li>
<li>item</li>
<li>item</li>
</ol>
</body>
</html>