<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/js/bootstrap.min.js"></script> <script src="//code.jquery.com/jquery-1.11.1.min.js"></script> <!------ Include the above in your HEAD tag ----------> <div class="container"> <div class="row"> <div class="col-md-1"><p></p></div> <div class="col-md-1"><p></p></div> <div class="col-md-1"><p></p></div> <div class="col-md-1"><p></p></div> <div class="col-md-1"><p></p></div> <div class="col-md-1"><p></p></div> <div class="col-md-1"><p></p></div> <div class="col-md-1"><p></p></div> <div class="col-md-1"><p></p></div> <div class="col-md-1"><p></p></div> <div class="col-md-1"><p></p></div> <div class="col-md-1"><p></p></div> </div> </div>

p { min-height: 800px; } div.col-md-1:nth-child(1n) p { background: red; } div.col-md-1:nth-child(2n) p { background: blue; } div.col-md-1:nth-child(3n) p { background: yellow; }