<div class='test1'> 颜色测试test1 </div>
<div class='test2'> 颜色测试test2 </div>
<div class='test3'> 颜色测试test3 </div>
.test1{
  color:red;
}
.test2{
  color:reb;
}
.test3{
  color:red;
  border:1px solid reb;
}
Rerun