<!doctype html>
<style>
* { padding: 0; margin: 0; }
div { position: absolute; 
	top: 50px; 
	left: 50px; 
	width:1px; 
	height:1px; 
	background: rgba(0,0,255,0.5);
	outline: 50px solid rgba(0,0,255,0.5); }
 }
</style>
<div></div>