diff --git a/chrono/manager/static/css/style.scss b/chrono/manager/static/css/style.scss
index 1570680b..922c480e 100644
--- a/chrono/manager/static/css/style.scss
+++ b/chrono/manager/static/css/style.scss
@@ -179,7 +179,7 @@ a.timeperiod-exception-all {
 	&.opening-hours {
 		z-index: 1;
 		background: #b1ea4d linear-gradient(135deg, #b1ea4d 0%, #459522 100%);
-		opacity: 0.3;
+		opacity: 0.6;
 		left: 0.5ex;
 		width: calc(100% - 1ex);
 	}