您可以使用修饰的 class label-default、label-primary、label-success、label-info、label-warning、label-danger 来改变标签的外观，如下面的实例所示：
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title>Bootstrap历练实例：标签修饰</title>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width,initial-scale=1.0" />
<link rel="stylesheet" href="bootstrap-3.3.5-dist/css/bootstrap.min.css" />
</head>
<body>
<div style="padding:100px">
<span class="label label-default">Label</span>
<span class="label label-success">Label</span>
<span class="label label-info">Label</span>
<span class="label label-primary">Label</span>
<span class="label label-warning">Label</span>
<span class="label label-danger">Label</span>
</div>
<script src="jQuery/jquery-2.1.4.js"></script>
<script src="bootstrap-3.3.5-dist/js/bootstrap.min.js"></script>
</body>
</html>