#menu ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  width: 300px;
  background-color: #f1f1f1;
}

#menu li a {
  display: block;
  color: black;
  padding: 8px 16px;
  text-decoration: none;
}

/* Change the link and background color on hover */
#menu li a:hover {
  background-color: DarkOliveGreen; /* #556B2F */
  color: white;
}