diff --git a/editor/shader/visual_shader_editor_plugin.cpp b/editor/shader/visual_shader_editor_plugin.cpp
index fd049870fd..cd3d0c8d91 100644
--- a/editor/shader/visual_shader_editor_plugin.cpp
+++ b/editor/shader/visual_shader_editor_plugin.cpp
@@ -1057,7 +1057,9 @@ void VisualShaderGraphPlugin::add_node(VisualShader::Type p_type, int p_id, bool
 		}
 
 		if (vsnode->is_port_separator(i)) {
-			node->add_child(memnew(HSeparator));
+			HSeparator *separator = memnew(HSeparator);
+			separator->add_theme_style_override("separator", editor->get_theme_stylebox("separator", "GraphNode"));
+			node->add_child(separator);
 			port_offset++;
 		}
 
diff --git a/editor/themes/theme_classic.cpp b/editor/themes/theme_classic.cpp
index fe0ab4753d..1f5278bf07 100644
--- a/editor/themes/theme_classic.cpp
+++ b/editor/themes/theme_classic.cpp
@@ -1430,6 +1430,8 @@ void ThemeClassic::populate_standard_styles(const Ref<EditorTheme> &p_theme, Edi
 			p_theme->set_stylebox("slot", "GraphNode", gn_slot_style);
 			p_theme->set_stylebox("slot_selected", "GraphNode", p_config.button_style_focus);
 
+			p_theme->set_stylebox("separator", "GraphNode", p_theme->get_stylebox("separator", "HSeparator"));
+
 			p_theme->set_color("resizer_color", "GraphNode", gn_decoration_color);
 
 			p_theme->set_constant("port_h_offset", "GraphNode", 1);
diff --git a/editor/themes/theme_modern.cpp b/editor/themes/theme_modern.cpp
index 5953a281ba..1ca9e00ccf 100644
--- a/editor/themes/theme_modern.cpp
+++ b/editor/themes/theme_modern.cpp
@@ -1435,6 +1435,9 @@ void ThemeModern::populate_standard_styles(const Ref<EditorTheme> &p_theme, Edit
 			p_theme->set_stylebox("slot", "GraphNode", gn_slot_style);
 			p_theme->set_stylebox("slot_selected", "GraphNode", p_config.focus_style);
 
+			const Color gn_separator_color = gn_frame_bg.lerp(p_config.mono_color, 0.1);
+			p_theme->set_stylebox("separator", "GraphNode", EditorThemeManager::make_line_stylebox(gn_separator_color, Math::round(2 * EDSCALE)));
+
 			p_theme->set_color("resizer_color", "GraphNode", gn_decoration_color);
 
 			p_theme->set_constant("port_h_offset", "GraphNode", 1);