Edit in JSFiddle

<div class="flexbox">
  Code with Palash
</div>

.flexbox {
  /* display flex */
  display: flex;
  align-items: center;
  justify-content: center;
  
  /* Spacing */
  height: 200px;
  width: 300px;
  margin: 40px;
  border: solid #79c0ff;
}