CSS turns the site gray

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在需要将网站变成灰色的时候可以在网页中插入如下代码

body{
filter: progid:DXImageTransform.Microsoft.BasicImage(grayscale=1);
-webkit-filter:grayscale(100%);
-moz-filter:grayscale(100%);
-ms-filter:grayscale(100%);
-o-filter:grayscale(100%);
filter:grayscale(100%);
filter:gray;
}