<a href="" class="text-success">Click me</a><br>


<a href="" class="btn">Click me</a><br>
<a href="" class="btn btn-primary">Primary</a> 
<a href="" class="btn btn-secondary">Secondary</a>
<a href="" class="btn btn-success">Success</a>
<a href="" class=" btn btn-warning">Warning</a>
<a href="" class=" btn btn-info">Info</a>
<a href="" class="btn btn-danger">Danger</a>
 <a href="" class=" btn btn-dark">Dark</a><a href="" class=" btn btn-light">Light</a><br>