diff --git a/frontend/src/index.css b/frontend/src/index.css
index 2425258..d9d1d76 100644
--- a/frontend/src/index.css
+++ b/frontend/src/index.css
@@ -170,14 +170,14 @@
    the tint must target the frame itself, not the td. */
 .fc .fc-day-sat .fc-daygrid-day-frame,
 .fc .fc-day-sun .fc-daygrid-day-frame {
-  background-color: rgba(255, 255, 255, 0.05) !important;
+  background-color: hsl(0 0% 10% / 0.65) !important;
 }
 
 
 /* Weekend tint: timegrid column cells (week/day view) */
 .fc .fc-timegrid-col.fc-day-sat,
 .fc .fc-timegrid-col.fc-day-sun {
-  background-color: rgba(255, 255, 255, 0.05) !important;
+  background-color: hsl(0 0% 5.5%) !important;
 }