<a href="yourlink" class="button yellow">Button text</a>

Replace 'yellow' with the next colors: white, green, bleumarin, rose, black

<div class="box-error">This box is for alerts</div>
This box is for errors or alerts
<div class="box-notice">This box is for notices</div>
This box is for notices
<div class="box-success">This is a success box</div>
This is a success box
<div class="box-info">This is an info box</div>
This is an info box