Bulma class: .icon

<span class="icon has-text-info">
  <i class="fas fa-info-circle"></i>
</span>
<span class="icon has-text-success">
  <i class="fas fa-check-square"></i>
</span>
<span class="icon has-text-warning">
  <i class="fas fa-exclamation-triangle"></i>
</span>
<span class="icon has-text-danger">
  <i class="fas fa-ban"></i>
</span>