diff --git a/kit/src/main/resources/com/oracle/javafx/scenebuilder/kit/css/ThemeDark.css b/kit/src/main/resources/com/oracle/javafx/scenebuilder/kit/css/ThemeDark.css
index 48726fb81..8bf1ccf8d 100644
--- a/kit/src/main/resources/com/oracle/javafx/scenebuilder/kit/css/ThemeDark.css
+++ b/kit/src/main/resources/com/oracle/javafx/scenebuilder/kit/css/ThemeDark.css
@@ -1,4 +1,5 @@
 /*
+ * Copyright (c) 2024, Gluon and/or its affiliates.
  * Copyright (c) 2014, Oracle and/or its affiliates.
  * All rights reserved. Use is subject to license terms.
  *
@@ -184,6 +185,7 @@
 .theme-presets .property-sheet > .viewport, 
 .theme-presets .SBKIT-library-panel, 
 .theme-presets .SBKIT-library-panel .accordion > .titled-pane > .content,
+.theme-presets .SBKIT-hierarchy-panel,
 .theme-presets .SBKIT-hierarchy-panel .tree-view {
     -fx-border-color: null;
     -fx-border-width: 0;
diff --git a/kit/src/main/resources/com/oracle/javafx/scenebuilder/kit/css/ThemeDefault.css b/kit/src/main/resources/com/oracle/javafx/scenebuilder/kit/css/ThemeDefault.css
index f3d17b7f3..a53b3599f 100644
--- a/kit/src/main/resources/com/oracle/javafx/scenebuilder/kit/css/ThemeDefault.css
+++ b/kit/src/main/resources/com/oracle/javafx/scenebuilder/kit/css/ThemeDefault.css
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017 Gluon and/or its affiliates.
+ * Copyright (c) 2017, 2024, Gluon and/or its affiliates.
  * Copyright (c) 2014, Oracle and/or its affiliates.
  * All rights reserved. Use is subject to license terms.
  *