<div class="centered">
<a href="#" title="WordPress" class="label label-primary">WordPress</a> 
<a href="#" title="Ghost" class="label label-primary">Ghost</a>
<a href="#" title="Bootstrap" class="label label-primary">Bootstrap</a> 
<a href="#" title="HTML5" class="label label-primary">HTML5</a>
<a href="#" title="CSS" class="label label-primary">CSS</a>
</div>

body {
  font-size: 1.5rem;
  line-height: 1.5;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0;
  min-height: 100vh;
  background-color: #00112c;
}
.centered {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}