<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"></script> <script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script> <!------ Include the above in your HEAD tag ----------> <div class="container cntr"> <div class="container-fluid cntr-fld"> <div class="row rw"> <div class="col-lg-4 col-md-4 col-sm-4 col-xs-4 clg-4"></div> <div class="col-lg-8 col-md-8 col-sm-8 col-xs-8 clg-8"></div> </div> </div> </div>

.cntr{ background-color:blue; } .cntr-fld{ background-color:green; } .rw{ background-color:red; } .clg-8{ background-color:cyan; height:50px; } .clg-4{ background-color:orange; height:50px; }