<!DOCTYPE html>
<html>
    <head>
        <title>CSS Test: -apple-color-filter reference</title>
        <link rel="author" title="Apple" href="http://www.apple.com/">
        <style type="text/css">
            .test
            {
                margin: 50px 20px;
                font: 120px Ahem;
                color: green;
            }
        </style>
    </head>
    <body>
        <div class="test" style="stroke-color: blue; stroke-width: 20px;">O</div>
        <div class="test" style="-webkit-text-stroke: 20px blue;">O</div>
    </body>
</html>