zZzzZ. — /home2/zrzvbdry/public_html/wp-content/plugins/wp-file-manager/lib/themes/light/css

Editing: contextmenu.css

/* contextmenu.css */
/* **Note** that the context menu is NOT inside the main elfinder div */
/* Context menu wrapper */
.elfinder-contextmenu,
.elfinder-contextmenu-sub,
.elfinder-button-menu {
  font-size: 16px;
  font-family: 'Open Sans', sans-serif;
  background: #fff!important;
  border: 1px solid #b5b5b5!important;
  box-shadow: 0 0 5px #cdcdcd!important;
  border-radius: 0;
  padding: 3px 3px 0 3px;
}

/* Menu item */
.elfinder-contextmenu .elfinder-contextmenu-item,
.elfinder-button-menu .elfinder-button-menu-item {
  margin: 0 0 3px 0;
}

/* Hovered menu item */
.elfinder-contextmenu .elfinder-contextmenu-item:hover,
.elfinder-button-menu .elfinder-button-menu-item:hover  {
  background: #dedddc;
  color: #000;
}

/* Item icon */
.elfinder-contextmenu .elfinder-contextmenu-item .elfinder-contextmenu-icon {
  /* */
}

/* Separator */
.elfinder-contextmenu .elfinder-contextmenu-separator {
  background: #e2e3e4;
  height: 1px;
  margin: 1px;
}

.elfinder-contextmenu .elfinder-button-icon-open + span {
  font-weight: bold;
}

.elfinder .elfinder-contextmenu-item .ui-icon.ui-icon-check {
    margin-top: -9px;
    left: 1px;
}
.elfinder .elfinder-contextmenu-rtl .elfinder-contextmenu-item .ui-icon.ui-icon-check {
    right: -1px;
    left: auto;
}