$grid->status(trans('alarm.status'))->display(function ($status) {
    if ($status==1) {
        return "<span class='label bg-red'>未处理</span>";
    }elseif ($status==2) {
        return "<span class='label bg-yellow'>处理中</span>";
    }elseif($status==3) {
        return "<span class='label bg-green'>已完成</span>";
    }else{
        return '异常';
    }
});
.bg-red    .bg-yellow   .bg-aqua   .bg-blue   .bg-light-blue   .bg-green,
.bg-navy   .bg-teal   .bg-olive   .bg-lime    .bg-orange   .bg-fuchsia   .bg-purple
.bg-maroon    .bg-black