diff --git a/app/styles/calendar.css b/app/styles/calendar.css
index 1123861..b423a14 100644
--- a/app/styles/calendar.css
+++ b/app/styles/calendar.css
@@ -2,7 +2,7 @@
   background-color: unset;
 }
 
-@media (prefers-color-scheme: dark) {
+[data-theme="dark"] {
   .rbc-off-range-bg {
     background: #12161f;
   }