网站灰色代码

<style>
    html{    
    filter: grayscale(100%);    
    -webkit-filter: grayscale(100%);    
    -moz-filter: grayscale(100%);    
    -ms-filter: grayscale(100%);    
    -o-filter: grayscale(100%);    
    filter: url("data:image/svg+xml;utf8,<svg xmlns=\'http://www.w3.org/2000/svg\'><filter id=\'grayscale\'><feColorMatrix type=\'matrix\' values=\'0.3333 0.3333 0.3333 0 0 0.3333 0.3333 0.3333 0 0 0.3333 0.3333 0.3333 0 0 0 0 0 1 0\'/></filter></svg>#grayscale");    
    filter:progid:DXImageTransform.Microsoft.BasicImage(grayscale=1);    
    -webkit-filter: grayscale(1);
    }
  </style>