Update index_menu.htm

src/admin/templets/index_menu.htm

@@ -62,7 +62,7 @@
 				padding-left: 30px;
 				height: 26px;
 				line-height: 26px;
-				background: #f6f6f6;
+				background: #f8f8f8;
 				border-radius: .2rem;
 				border-bottom: 1px solid #dee2e6;
 				cursor: pointer