diff --git a/frontend/src/index.css b/frontend/src/index.css
index 28b3c05..88144e3 100644
--- a/frontend/src/index.css
+++ b/frontend/src/index.css
@@ -167,25 +167,25 @@
 /* Weekend column tint */
 .fc .fc-day-sat,
 .fc .fc-day-sun {
-  background-color: hsl(0 0% 5%);
+  background-color: hsl(0 0% 100% / 0.03);
 }
 
 /* Weekend tint: header cells (higher specificity to override .fc-col-header-cell) */
 .fc .fc-col-header-cell.fc-day-sat,
 .fc .fc-col-header-cell.fc-day-sun {
-  background-color: hsl(0 0% 5%) !important;
+  background-color: hsl(0 0% 100% / 0.03) !important;
 }
 
 /* Weekend tint: timegrid column cells */
 .fc .fc-timegrid-col.fc-day-sat,
 .fc .fc-timegrid-col.fc-day-sun {
-  background-color: hsl(0 0% 5%);
+  background-color: hsl(0 0% 100% / 0.03);
 }
 
 /* Weekend tint: daygrid frame layer (paints above td background in FC6) */
 .fc .fc-day-sat .fc-daygrid-day-frame,
 .fc .fc-day-sun .fc-daygrid-day-frame {
-  background-color: hsl(0 0% 5%);
+  background-color: hsl(0 0% 100% / 0.03);
 }
 
 .fc .fc-col-header-cell {