<!DOCTYPE html>
<html>
<head>
<style>
div {
font-size: 80px;
color: gray;
text-shadow: none;
stroke-width: 10px;
display: inline;
}
</style>
</head>
<body>
<div style="stroke-color: red;">◼</div>
<div style="stroke-color: blue;">◼</div>
<div style="stroke-color: #ff00ffff;">◼</div>
<div style="stroke-color: #ffff00ff;">◼</div>
<div style="stroke-color: red;"><span>◼</span></div>
<div style="stroke-color: blue;"><span>◼</span></div>
<div style="stroke-color: #ff00ffff;"><span>◼</span></div>
<div style="stroke-color: #ffff00ff;"><span>◼</span></div>
</body>
</html>