SO wide background

HTML

<script src="//netdna.bootstrapcdn.com/twitter-bootstrap/2.3.0/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="//netdna.bootstrapcdn.com/twitter-bootstrap/2.3.0/css/bootstrap-combined.min.css">
<div class="wideBackground">  
    
    <div class="container">
    <div class="row-fluid">
    <div class="row12">
        <h1>123</h1>
        </div <!-- close row12 -->
    </div> <!-- close row-fluid -->
    </div><!-- close container -->

    </div><!-- close wideBackground -->

CSS

.wideBackground{
     background-color:red;
    }

.row12{
    background-color:pink;
    height:200px;
}