diff --git a/public/css/custom.css b/public/css/custom.css
index 5c3e23b..bee9d0c 100644
--- a/public/css/custom.css
+++ b/public/css/custom.css
@@ -93,4 +93,11 @@
     top: 0px !important;
     left: 5px !important;
     text-align: left !important;
-  }
\ No newline at end of file
+  }
+
+  /* userList */
+
+  .grayscaleImg {
+    filter: grayscale(100%);
+  }
+  
\ No newline at end of file