diff --git a/theme/boost/scss/moodle/calendar.scss b/theme/boost/scss/moodle/calendar.scss
index 53fdb52eac8..4240095bba6 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 0b5433960a6..8e18055524e 100644
--- a/theme/boost/style/moodle.css
+++ b/theme/boost/style/moodle.css
@@ -12986,7 +12986,7 @@ 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 724aeb6e3e7..941ba977e37 100644
--- a/theme/classic/style/moodle.css
+++ b/theme/classic/style/moodle.css
@@ -13201,7 +13201,7 @@ table.calendartable caption {
     margin: 0; }
 
 .cal_courses_flt {
-  color: #868e96; }
+  color: #6c757d; }
 
 .content-bank-container .cb-content-wrapper {
   padding: 0.5rem;