Template:Tabs.css

.tabber__tab[aria-selected='true'],
.tabber__tab[aria-selected='true']:visited,
.tabber__tab:hover,
.tabber__tab[aria-selected='true']:hover {
    color: #ECEBEB !important;
}

.tabber__tab[aria-selected='true'] {
    box-shadow: 0 -2px 0 #ECEBEB inset !important;
}