diff --git a/css/okadmin.css b/css/okadmin.css
index 60eb2d3..7b721a0 100644
--- a/css/okadmin.css
+++ b/css/okadmin.css
@@ -2,7 +2,15 @@
 @import "../lib/fonts/iconfont.css";
 @import "./okadmin.theme.css";
 @import "../lib/layui/css/okmodules/jquery.contextMenu.css";
-
+html{
+    webkit-filter: grayscale(100%);
+    -moz-filter: grayscale(100%);
+    -ms-filter: grayscale(100%);
+    -o-filter: grayscale(100%);
+    filter: grayscale(100%);
+    filter: progid:DXImageTransform.Microsoft.BasicImage(grayscale=1);
+    filter: gray;
+}
 /*边距*/
 .ptb20{
     padding-top: 20px;