.info-panel button[role=tab].links, .info-panel .i.links {
    background-image: url(https://cdn.gr.ch/gr/dev/images/icons-set/weiss/context-menu/kontakt.svg) !important;
}

.informations>ul>li.clicked button[role=tab].links, .informations>ul>li.clicked .i.links {
    background-image: url(https://cdn.gr.ch/gr/dev/images/icons-set/blau/context-menu/kontakt.svg) !important;
}