#adminmenu .separator {
    border-top: 1px solid rgb(206 206 206 / 30%);
    border-bottom: 1px solid rgb(206 206 206 / 30%);
        height: 5px;
    margin: 10px 0;
}
#adminmenu, #adminmenu .wp-submenu, #adminmenuback, #adminmenuwrap {
    width: 260px;
    background-color: #1d2327;
}
#wpcontent, #wpfooter {
    margin-left: 260px;
}