ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background-color: #ffffff;
}

ul li {
  float: left;
}

ul li a {
  display: block;
  color: #1B263B;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
}

ul li a:hover {
  background-color: #111111;
}

.blanco {
  background-color: #f9f9f9;
  display: flex;
  flex-direction: row;
}

.azul {
  background-color: #1B263B;
  color: white;
  display: flex;
  flex-direction: row;
}