bootstrap css success buttons

On Twitter bootstrap, 4 type of danger button:

success button Twitter Bootstrap 3.0.0

success button Twitter Bootstrap 3.0.0

Large button html code is here :

<button type="button" class="btn btn-danger btn-lg">Large button</button>

Default danger button :

 <button type="button" class="btn btn-success">Default button</button>

Small button html code is here :

<button type="button" class="btn btn-success btn-sm">Small button</button>

Extra small button code is here :

<button type="button" class="btn btn-success btn-xs">Extra small button</button>

The bellow image is on Twitter bootstrap 2.3.2 version.

bootstrap-css-success-button

bootstrap-css-success-button