You can add an extra class (any name) to this particular div and use the given css for it.
.custom{ margin-bottom:10px; }
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet"/> <div class="container"> <div class="row"> <div class="col-sm-2 col-sm-offset-1 custom" style="background-color:lavender;">col-1</div> <div class="col-sm-2 col-sm-offset-1 custom" style="background-color:lavenderblush;">col-2</div> <div class="col-sm-2 col-sm-offset-1 custom" style="background-color:lavender;">col-3</div> <div class="col-sm-2 col-sm-offset-1 custom" style="background-color:lavenderblush;">col-4</div> </div> </div>
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