diff --git a/rslib/backend.proto b/rslib/backend.proto
index 4f31670b2..2af60ab6e 100644
--- a/rslib/backend.proto
+++ b/rslib/backend.proto
@@ -1103,7 +1103,6 @@ message GraphsPreferencesOut {
   }
   Weekday calendar_first_day_of_week = 1;
   bool card_counts_separate_inactive = 2;
-
 }
 
 message RevlogEntry {
diff --git a/ts/graphs/calendar.ts b/ts/graphs/calendar.ts
index 142d56763..49d127bcc 100644
--- a/ts/graphs/calendar.ts
+++ b/ts/graphs/calendar.ts
@@ -178,6 +178,7 @@ export function renderCalendar(
         .attr("height", height - 2)
         .attr("x", x(1)! - 3)
         .attr("y", (_d, index) => bounds.marginTop + index * height)
+        .attr("fill", emptyColour)
         .attr("dominant-baseline", "hanging")
         .attr("text-anchor", "end")
         .attr("font-size", "small")