<div class="fa-4x">
  <i class="fas fa-microphone"></i>
  <i class="fab fa-twitter"></i>
  <i class="fas fa-phone"></i>
  <i class="fas fa-pencil-alt"></i>
  
  <span class="fa-layers">
    <i class="fas fa-circle"></i>
    <i class="fa-inverse fas fa-times" data-fa-transform="shrink-6"></i>
  </span>
</div>

<script defer src="https://use.fontawesome.com/releases/v5.0.4/js/all.js"></script>

.fa-microphone {
  color:#2eaabe;
}
.fa-twitter {
  color: #3a9ef0;
}
.fa-phone {
 color: #be2e42;
}
.fa-pencil-alt {
  color: #74bb23;
}
.fa-circle {
  color:Tomato
}