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<!DOCTYPE html>
<html lang="en">
<head>
  <title>Bootstrap Case</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.2/jquery.min.js"></script>
  <script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
</head>
<body> 
 
<div class="container">
  <h2>Contextual Label Classes</h2>
  <p>Contextual classes can be used to color the label.</p>  
  <span class="label label-default">Default Label</span>
  <span class="label label-primary">Primary Label</span>
  <span class="label label-success">Success Label</span>
  <span class="label label-info">Info Label</span>
  <span class="label label-warning">Warning Label</span>
  <span class="label label-danger">Danger Label</span>
</div>

</body>
</html>