/* .light-gray {
  background-color: lightgrey;
}

.dark-gray {
  background-color: grey;
} */

.col-xl-3:nth-child(odd) {
  background-color: lightgrey;
  border: 10px solid white;
}
.col-xl-3:nth-child(even) {
  background-color: grey;
  border: 10px solid white;
}

.content {
  height: 100px;
}

body {
  margin-right: 30px;
}