diff --git a/theme/boost/scss/moodle/calendar.scss b/theme/boost/scss/moodle/calendar.scss
index e8977fd7897..e8de3c2708d 100644
--- a/theme/boost/scss/moodle/calendar.scss
+++ b/theme/boost/scss/moodle/calendar.scss
@@ -455,5 +455,5 @@ table.calendartable caption {
 }
 
 .cal_courses_flt {
-    color: #868e96;
+    color: $gray-600;
 }
diff --git a/theme/boost/style/moodle.css b/theme/boost/style/moodle.css
index d0a46e10821..5dfcd4add69 100644
--- a/theme/boost/style/moodle.css
+++ b/theme/boost/style/moodle.css
@@ -13006,7 +13006,7 @@ table.calendartable caption {
     margin: 0; }
 
 .cal_courses_flt {
-  color: #868e96; }
+  color: #6c757d; }
 
 .content-bank-container .cb-content-wrapper {
   padding: 0.5rem;
diff --git a/theme/classic/style/moodle.css b/theme/classic/style/moodle.css
index 6792711103a..b42de59ede5 100644
--- a/theme/classic/style/moodle.css
+++ b/theme/classic/style/moodle.css
@@ -13220,7 +13220,7 @@ table.calendartable caption {
     margin: 0; }
 
 .cal_courses_flt {
-  color: #868e96; }
+  color: #6c757d; }
 
 .content-bank-container .cb-content-wrapper {
   padding: 0.5rem;