bootstrap 字体颜色

<div class="container"> <em>em</em> <b>b</b> <strong>strong</strong> <p class="muted">class="muted"</p> <p class="text-warning">text-warning</p> <p class="text-error">text-error</p> <p class="text-info">text-info</p> <p class="text-success">text-success</p> </div>