Template:Taxobox/core/styles.css

/* {{pp-template}} */
html.skin-theme-clientpref-night .infobox.biota tr {
  background: transparent !important;
}
html.skin-theme-clientpref-night .infobox.biota img {
  background: white;
}

@media (prefers-color-scheme: dark) {
    html.skin-theme-clientpref-os .infobox.biota tr {
      background: transparent !important;
    }
    html.skin-theme-clientpref-os .infobox.biota img {
      background: white;
    }
}