<!DOCTYPE html>

<html>
<head>
    <style>
        div {
            font-size: 200px;
            color: gray;
            text-shadow: none;
            -webkit-text-stroke-color: blue;
        }
    </style>
</head>
<body>

<div style="stroke-width: 0%;">&#x25fc;</div>
<div style="stroke-width: 1%;">&#x25fc;</div>
<div style="stroke-width: 2%;">&#x25fc;</div>
<div style="stroke-width: 5%;">&#x25fc;</div>
<div style="stroke-width: 10%;">&#x25fc;</div>

</body>
</html>