Default box
<div class="box">
some text inside the box..
</div><!-- /box -->Dark box
<div class="box dark">
some text inside the box..
</div><!-- /box -->Primary box
<div class="box primary">
some text inside the box..
</div><!-- /box -->Secondary box
<div class="box secondary">
some text inside the box..
</div><!-- /box -->