diff --git a/frontend/less/dark/variables.less b/frontend/less/dark/variables.less
index ba34c8b090..9fb87bdd15 100644
--- a/frontend/less/dark/variables.less
+++ b/frontend/less/dark/variables.less
@@ -99,7 +99,7 @@
 
 @calendar-today-bg-value: @table-bg-accent-value;
 @calendar-border-value: #666363;
-@calendar-busy-bg-value: #302525;
+@calendar-busy-bg-value: #523636;
 
 @label-color-value: #dfdfdf;
 @label-default-bg-value: #4e4c4c;