View source for Template:Rule/styles.css

/* default rule styles:
 * Overridden by inline styles or index CSS if needed 
 */
.wst-rule {
	background-color: black;
	color: black;
	width: auto;
	margin: 2px auto 2px auto;
	height: 1px; 
}

.wst-rule.__uirule {
	/* max-width: 100%; commented pending further discussion */
	background-color: #a2a9b1;
	height: 1px;
	width: auto;
	border: 0;
	margin: 0.2em auto;
	
}