| 通过指定意义的颜色类可以为表格的行或者单元格设置颜色: 
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 </head>
 <body>
 <div class="container">
 <h2>指定意义的颜色类</h2>
 <p>通过指定意义的颜色类可以为表格的行或者单元格设置颜色:</p>
 <table class="table">
 <thead>
 <tr>
 <th>Firstname</th>
 <th>Lastname</th>
 <th>Email</th>
 </tr>
 </thead>
 <tbody>
 <tr>
 <td>Default</td>
 <td>Defaultson</td>
 <td>def@somemail.com</td>
 </tr>
 <tr class="table-primary">
 <td>Primary</td>
 <td>Joe</td>
 <td>joe@example.com</td>
 </tr>
 <tr class="table-success">
 <td>Success</td>
 <td>Doe</td>
 <td>john@example.com</td>
 </tr>
 <tr class="table-danger">
 <td>Danger</td>
 <td>Moe</td>
 <td>mary@example.com</td>
 </tr>
 <tr class="table-info">
 <td>Info</td>
 <td>Dooley</td>
 <td>july@example.com</td>
 </tr>
 <tr class="table-warning">
 <td>Warning</td>
 <td>Refs</td>
 <td>bo@example.com</td>
 </tr>
 <tr class="table-active">
 <td>Active</td>
 <td>Activeson</td>
 <td>act@example.com</td>
 </tr>
 <tr class="table-secondary">
 <td>Secondary</td>
 <td>Secondson</td>
 <td>sec@example.com</td>
 </tr>
 <tr class="table-light">
 <td>Light</td>
 <td>Angie</td>
 <td>angie@example.com</td>
 </tr>
 <tr class="table-dark text-dark">
 <td>Dark</td>
 <td>Bo</td>
 <td>bo@example.com</td>
 </tr>
 </tbody>
 </table>
 </div>
 </body>
 </html>
 尝试一下
 下表列出了表格颜色类的说明:
 
 类名        描述
 .table-primary        蓝色: 指定这是一个重要的操作
 .table-success        绿色: 指定这是一个允许执行的操作
 .table-danger        红色: 指定这是可以危险的操作
 .table-info        浅蓝色: 表示内容已变更
 .table-warning        橘色: 表示需要注意的操作
 .table-active        灰色: 用于鼠标悬停效果
 .table-secondary        灰色: 表示内容不怎么重要
 .table-light        浅灰色,可以是表格行的背景
 .table-dark        深灰色,可以是表格行的背景
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