css实现一色多变化

 .pesudo{
          position: absolute;
          top:50%;
          left: 50%;
          transform:translate(-50%,-50%);
           120px;
          padding: 60px;
          text-align: center;
          color: white;
          font-size: 200%;
          border-radius:1em;
          background:#00aabb;
          cursor:pointer;
        }
        .pesudo:before{
          position: absolute;
          top: 0; right: 0; bottom: 0; left: 0;
          z-index:-1;
          border-radius:1em;
          background:rgba(0,0,0,.1);
        }
        .pesudo:hover:before{
          content:"";
        }
        .pesudo:after{
          position: absolute;
          top: 0; right: 0; bottom: 0; left: 0;
          z-index:-1;
          border-radius:1em;
          background:rgba(255,255,255,.2);
        }
        .pesudo:active:after{
          content:"";
        }
      

　　

陈大吊