Template:Alternating rows table/styles.css

.alternating:not(.sortable) tr:nth-child(odd),
.alternating.sortable tr:nth-child(even),
.alternating:not(.sortable) tr:nth-child(odd) th[scope="row"],
.alternating.sortable tr:nth-child(even) th[scope="row"] {
	background-color: #eee;
}