diff --git a/doc/rc/dark-256.theme b/doc/rc/dark-256.theme
index 5fd2b5f4b..1a3925ae2 100644
--- a/doc/rc/dark-256.theme
+++ b/doc/rc/dark-256.theme
@@ -44,7 +44,7 @@ color.recurring=rgb013
 color.scheduled=on rgb001
 color.until=
 color.blocked=white on color8
-color.blocking=white on color15
+color.blocking=black on color15
 
 # Project
 color.project.none=