Template:Administrators' noticeboard/styles.css

.active-tab {
	background-color: #d7e8f9;
}

html.skin-theme-clientpref-night .active-tab {
	background-color: #1c2940;
}

@media screen and (prefers-color-scheme: dark) {
	/* automatic mode */
	html.skin-theme-clientpref-os .active-tab {
		background-color: #1c2940;
	}
}