diff --git a/css/light-grey.css b/css/light-grey.css
index e62f61fac..5ac6a419f 100644
--- a/css/light-grey.css
+++ b/css/light-grey.css
@@ -729,3 +729,6 @@ td.cell_error {
 	font-weight: bold;
 	color: #D81515;
 }
+table.transparent, table.transparent td {
+	background: transparent;
+}
\ No newline at end of file