bootstrap4 各颜色徽章

<span class="badge badge-primary">主要</span>

<span class="badge badge-secondary">次要</span>

<span class="badge badge-success">成功</span>

<span class="badge badge-danger">危险</span>

<span class="badge badge-warning">警告</span>

<span class="badge badge-info">信息</span>

<span class="badge badge-light">浅色</span>

<span class="badge badge-dark">深色</span>