Template:Umbox/styles.css

.umbox {
	background-color: var(--background-color-content-added, #a3d3ff);
	border: 1px solid var(--border-color-progressive, #36c);
	padding: 0.5em 1em;
	margin: 2em 0 1em;
	font-weight: bold;
	overflow: auto;
	vertical-align: middle;
}