让页面图片文字整体变灰

/*让页面变太色*/
html {
filter: grayscale(100%);
-webkit-filter: grayscale(100%);
-moz-filter: grayscale(100%);
-ms-filter: grayscale(100%);
-o-filter: grayscale(100%);
filter: url(desaturate.svg#grayscale);
filter:progid:DXImageTransform.Microsoft.BasicImage(grayscale=1);

-webkit-filter: grayscale(1);

转载来自：http://blog.linxz.de/gray-your-page-so-easy/