Template:New collapse/styles.css

/* increase specificity */ .new-collapse.new-collapse > .mw-collapsible-toggle { color: #0645ad; font-weight: bold; background: none; background-image: url(https://upload.wikimedia.org/wikipedia/commons/a/a1/OOjs_UI_icon_caretDown.svg); /* */ background-size: 1.27em; background-repeat: no-repeat; background-position: left center; padding-left: 1.77em; }