diff --git a/blocks/moodleblock.class.php b/blocks/moodleblock.class.php
index d2a7a447a84..b09adad042f 100644
--- a/blocks/moodleblock.class.php
+++ b/blocks/moodleblock.class.php
@@ -232,7 +232,7 @@ class block_base {
                 $bc->footer = $this->content->footer;
             }
         } else {
-            $bc->add_class('invisible');
+            $bc->add_class('invisibleblock');
         }
 
         if (!$this->hide_header()) {
diff --git a/theme/boost/scss/moodle/blocks.scss b/theme/boost/scss/moodle/blocks.scss
index dc1c7e6f04a..178e38e3b90 100644
--- a/theme/boost/scss/moodle/blocks.scss
+++ b/theme/boost/scss/moodle/blocks.scss
@@ -328,3 +328,7 @@ body.drawer-open-left #region-main.has-blocks {
         margin-right: 2px;
     }
 }
+
+.block.invisibleblock .card-title {
+    color: $text-muted;
+}
\ No newline at end of file
diff --git a/theme/boost/style/moodle.css b/theme/boost/style/moodle.css
index 84d746a6f76..15f9bfb421b 100644
--- a/theme/boost/style/moodle.css
+++ b/theme/boost/style/moodle.css
@@ -11413,6 +11413,9 @@ div.editor_atto_toolbar button .icon {
   .block_settings .block_tree p.hasicon .icon {
     margin-right: 2px; }
 
+.block.invisibleblock .card-title {
+  color: #868e96; }
+
 .navbar {
   max-height: 50px; }
 
diff --git a/theme/classic/style/moodle.css b/theme/classic/style/moodle.css
index 03a8838470c..a8a9f2f8d89 100644
--- a/theme/classic/style/moodle.css
+++ b/theme/classic/style/moodle.css
@@ -11655,6 +11655,9 @@ div.editor_atto_toolbar button .icon {
   .block_settings .block_tree p.hasicon .icon {
     margin-right: 2px; }
 
+.block.invisibleblock .card-title {
+  color: #868e96; }
+
 .navbar {
   max-height: 50px; }