diff --git a/common/lib_tree_model_adapter.cpp b/common/lib_tree_model_adapter.cpp
index f9dfd5eff0..e7691ffc93 100644
--- a/common/lib_tree_model_adapter.cpp
+++ b/common/lib_tree_model_adapter.cpp
@@ -91,7 +91,7 @@ public:
         // We should be able to pass wxDATAVIEW_CELL_SELECTED into RenderText() and have it do
         // the right thing -- but it picks wxSYS_COLOUR_HIGHLIGHTTEXT on MacOS and GTK (instead
         // of wxSYS_COLOUR_LISTBOXHIGHLIGHTTEXT).
-        if ( aState & wxDATAVIEW_CELL_SELECTED )
+        if( aState & wxDATAVIEW_CELL_SELECTED )
             dc->SetTextForeground( wxSystemSettings::GetColour( wxSYS_COLOUR_LISTBOXHIGHLIGHTTEXT ) );
 
         aRect.Deflate( 1 );
diff --git a/eeschema/symbol_tree_synchronizing_adapter.cpp b/eeschema/symbol_tree_synchronizing_adapter.cpp
index 4afb0ceeab..47f7fe01d1 100644
--- a/eeschema/symbol_tree_synchronizing_adapter.cpp
+++ b/eeschema/symbol_tree_synchronizing_adapter.cpp
@@ -329,22 +329,11 @@ bool SYMBOL_TREE_SYNCHRONIZING_ADAPTER::GetAttr( wxDataViewItem const& aItem, un
         // mark the current library if it's collapsed
         if( curSymbol && curSymbol->GetLibId().GetLibNickname() == node->m_LibId.GetLibNickname() )
         {
-#if 1
             if( !m_widget->IsExpanded( ToItem( node ) ) )
             {
-                // LIB_TREE_RENDERER uses strikethrough as a proxy for is-canvas-item
-                aAttr.SetStrikethrough( true );
+                aAttr.SetStrikethrough( true );   // LIB_TREE_RENDERER uses strikethrough as a
+                                                  // proxy for "is canvas item"
             }
-#else
-#ifdef __WXGTK__
-            // The native wxGTK+ impl ignores background colour, so set the text colour instead.
-            // This works reasonably well in dark themes, and quite poorly in light ones....
-            aAttr.SetColour( wxSystemSettings::GetColour( wxSYS_COLOUR_HIGHLIGHT ) );
-#else
-            aAttr.SetBackgroundColour( wxSystemSettings::GetColour( wxSYS_COLOUR_HIGHLIGHT  ) );
-            aAttr.SetColour( wxSystemSettings::GetColour( wxSYS_COLOUR_LISTBOXHIGHLIGHTTEXT  ) );
-#endif
-#endif
         }
         break;
 
@@ -358,19 +347,8 @@ bool SYMBOL_TREE_SYNCHRONIZING_ADAPTER::GetAttr( wxDataViewItem const& aItem, un
         // mark the current (on-canvas) part
         if( curSymbol && curSymbol->GetLibId() == node->m_LibId )
         {
-#if 1
-            // LIB_TREE_RENDERER uses strikethrough as a proxy for is-canvas-item
-            aAttr.SetStrikethrough( true );
-#else
-#ifdef __WXGTK__
-        // The native wxGTK+ impl ignores background colour, so set the text colour instead.
-        // This works reasonably well in dark themes, and quite poorly in light ones....
-            aAttr.SetColour( wxSystemSettings::GetColour( wxSYS_COLOUR_HIGHLIGHT ) );
-#else
-            aAttr.SetBackgroundColour( wxSystemSettings::GetColour( wxSYS_COLOUR_HIGHLIGHT ) );
-            aAttr.SetColour( wxSystemSettings::GetColour( wxSYS_COLOUR_LISTBOXHIGHLIGHTTEXT  ) );
-#endif
-#endif
+            aAttr.SetStrikethrough( true );   // LIB_TREE_RENDERER uses strikethrough as a
+                                              // proxy for "is canvas item"
         }
         break;
 
diff --git a/pcbnew/fp_tree_synchronizing_adapter.cpp b/pcbnew/fp_tree_synchronizing_adapter.cpp
index 8cf8f9b4b9..f91f34396c 100644
--- a/pcbnew/fp_tree_synchronizing_adapter.cpp
+++ b/pcbnew/fp_tree_synchronizing_adapter.cpp
@@ -280,14 +280,12 @@ bool FP_TREE_SYNCHRONIZING_ADAPTER::GetAttr( wxDataViewItem const& aItem, unsign
     case LIB_TREE_NODE::LIBRARY:
         if( node->m_Name == m_frame->GetLoadedFPID().GetLibNickname() )
         {
-#ifdef __WXGTK__
-            // The native wxGTK+ impl ignores background colour, so set the text colour
-            // instead.  Works reasonably well in dark themes, less well in light ones....
-            aAttr.SetColour( wxSystemSettings::GetColour( wxSYS_COLOUR_HIGHLIGHT ) );
-#else
-            aAttr.SetBackgroundColour( wxSystemSettings::GetColour( wxSYS_COLOUR_HIGHLIGHT ) );
-            aAttr.SetColour( wxSystemSettings::GetColour( wxSYS_COLOUR_LISTBOXHIGHLIGHTTEXT  ) );
-#endif
+            // mark the current library if it's collapsed
+            if( !m_widget->IsExpanded( ToItem( node ) ) )
+            {
+                aAttr.SetStrikethrough( true );   // LIB_TREE_RENDERER uses strikethrough as a
+                                                  // proxy for "is canvas item"
+            }
 
             // mark modified libs with bold font
             if( m_frame->GetScreen()->IsContentModified() && !m_frame->IsCurrentFPFromBoard() )
@@ -298,14 +296,9 @@ bool FP_TREE_SYNCHRONIZING_ADAPTER::GetAttr( wxDataViewItem const& aItem, unsign
     case LIB_TREE_NODE::ITEM:
         if( node->m_LibId == m_frame->GetLoadedFPID() )
         {
-#ifdef __WXGTK__
-            // The native wxGTK+ impl ignores background colour, so set the text colour
-            // instead.  Works reasonably well in dark themes, less well in light ones....
-            aAttr.SetColour( wxSystemSettings::GetColour( wxSYS_COLOUR_HIGHLIGHT ) );
-#else
-            aAttr.SetBackgroundColour( wxSystemSettings::GetColour( wxSYS_COLOUR_HIGHLIGHT ) );
-            aAttr.SetColour( wxSystemSettings::GetColour( wxSYS_COLOUR_LISTBOXHIGHLIGHTTEXT  ) );
-#endif
+            // mark the current (on-canvas) part
+            aAttr.SetStrikethrough( true );     // LIB_TREE_RENDERER uses strikethrough as a
+                                                // proxy for "is canvas item"
 
             // mark modified part with bold font
             if( m_frame->GetScreen()->IsContentModified() && !m_frame->IsCurrentFPFromBoard() )