<button class="btn btn-primary">
    Primary
</button>

<button class="btn btn-secondary">
    Secondary
</button>

<button class="btn btn-success">
    Success
</button>

<button class="btn btn-danger">
    Danger
</button>

<button class="btn btn-warning">
    Warning
</button>

<button class="btn btn-large btn-primary">
    Primary
</button>