Template:Invert in dark mode/styles.css

/* Colours for dark mode GUI */
@media screen {
	html.skin-theme-clientpref-night .darkmode-invert {
	    filter: invert(100%) hue-rotate(180deg); }
	html.skin-theme-clientpref-night .darkmode-invert a { color: #0046f8; }
	html.skin-theme-clientpref-night .darkmode-invert a:visited { color: #2e00dd; }
	html.skin-theme-clientpref-night .darkmode-noinvert {
	    filter: invert(100%) hue-rotate(180deg); }
}

@media screen and ( prefers-color-scheme: dark ) {
	html.skin-theme-clientpref-os .darkmode-invert {
	    filter: invert(100%) hue-rotate(180deg); }
	html.skin-theme-clientpref-os .darkmode-invert a { color: #0046f8; }
	html.skin-theme-clientpref-os .darkmode-invert a:visited { color: #2e00dd; }
	html.skin-theme-clientpref-os .darkmode-noinvert {
	    filter: invert(100%) hue-rotate(180deg); }
}