performance-art.fr/sites/all/modules/contrib/admin/admin_menu/admin_menu.color.css

/**
 * @file
 * Administration menu color override.
 */

#admin-menu {
  background-color: #911;
  background-image: url(images/bkg-red.png);
}
#admin-menu li.admin-menu-action a {
  border-left-color: #a91f1f;
}

/* All lists */
#admin-menu ul a {
  border-right-color: #a91f1f;
}
#admin-menu ul li.admin-menu-tab a {
  border-right-color: #52565e;
}
#admin-menu li li a {
  border-top-color: #801f1f;
}

/* All list items */
#admin-menu li li {
  background-color: #991f1f;
}

/* Second-and-more-level hovering */
#admin-menu li li.expandable {
  background-color: #b93f3f;
}
#admin-menu li li:hover {
  background-color: #690f0f;
}
#admin-menu li li.expandable:hover a,
#admin-menu li li.expandable:hover li.expandable:hover a {
  border-color: #801f1f;
}
#admin-menu li li.expandable:hover li a,
#admin-menu li li.expandable:hover li.expandable:hover li a {
  border-color: #801f1f;
}