#wp-admin-bar-wc-inspector span.wc-inspector-toggle {
  height: 10px;
  width: 10px;
  border-radius: 50%;
  background: #ccc;
  display: inline-block;
  vertical-align: middle;
  margin-right: 7px;
  position: relative;
}
#wp-admin-bar-wc-inspector span.active {
  background: green;
}
#wp-admin-bar-wc-inspector span.inactive {
  background: red;
}