diff --git a/src/calendar.c b/src/calendar.c
index f61510cb..f2ff4059 100644
--- a/src/calendar.c
+++ b/src/calendar.c
@@ -917,6 +917,9 @@ static void GenerateCalEntries(int col)
     ClearGlobalOmits();
     DestroyOmitContexts();
     DestroyVars(0);
+    DefaultColorR = -1;
+    DefaultColorG = -1;
+    DefaultColorB = -1;
     NumTriggered = 0;
     ClearLastTriggers();
 
diff --git a/src/main.c b/src/main.c
index cf0840ef..f37727d3 100644
--- a/src/main.c
+++ b/src/main.c
@@ -130,6 +130,9 @@ int main(int argc, char *argv[])
 	    ClearGlobalOmits();
 	    DestroyOmitContexts();
 	    DestroyVars(0);
+	    DefaultColorR = -1;
+	    DefaultColorG = -1;
+	    DefaultColorB = -1;
 	    NumTriggered = 0;
 	    ClearLastTriggers();
 	    JulianToday++;