.myDiv {
  border: 5px outset red;
  background-color: lightblue;
  text-align: center;
}

.table {
   display: table;
   position: absolute;
   height: 100%;
   width: 100%;
}
.cell {
  display: table-cell;
  vertical-align: middle;
  text-align: center;
}
.text {
  font-size:xx-large;
}