diff --git a/CustomWidgets/DockingTabControl.cs b/CustomWidgets/DockingTabControl.cs
index 28f47c247..5de09b18b 100644
--- a/CustomWidgets/DockingTabControl.cs
+++ b/CustomWidgets/DockingTabControl.cs
@@ -166,7 +166,7 @@ namespace MatterHackers.MatterControl.CustomWidgets
 			SimpleTabs tabControl = null;
 			if (this.ControlIsPinned)
 			{
-				var resizePage = new LeftResizeContainer()
+				var resizePage = new LeftResizeContainer(theme)
 				{
 					Width = this.ConstrainedWidth,
 					VAnchor = VAnchor.Stretch,
@@ -230,7 +230,7 @@ namespace MatterHackers.MatterControl.CustomWidgets
 				}
 				else // control is floating
 				{
-					var resizeContainer = new LeftResizeContainer()
+					var resizeContainer = new LeftResizeContainer(theme)
 					{
 						Width = this.ConstrainedWidth,
 						VAnchor = VAnchor.Stretch,
diff --git a/CustomWidgets/ResizeContainer/BottomResizeContainer.cs b/CustomWidgets/ResizeContainer/BottomResizeContainer.cs
index e90a8c92d..21093d710 100644
--- a/CustomWidgets/ResizeContainer/BottomResizeContainer.cs
+++ b/CustomWidgets/ResizeContainer/BottomResizeContainer.cs
@@ -1,5 +1,5 @@
 /*
-Copyright (c) 2017, Lars Brubaker, John Lewin
+Copyright (c) 2018, Lars Brubaker, John Lewin
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
@@ -40,17 +40,18 @@ namespace MatterHackers.MatterControl.CustomWidgets
 
 		private int _splitterHeight;
 
-		internal BottomResizeContainer()
+		internal BottomResizeContainer(ThemeConfig theme)
 			: base (FlowDirection.TopToBottom)
 		{
 			this.HAnchor = HAnchor.Absolute;
 			this.Cursor = Cursors.HSplit;
-			SplitterHeigt = 10;
+			this.SplitterHeight = theme.SplitterWidth;
+			this.SpliterBarColor = theme.SplitterBackground;
 		}
 
-		public Color SpliterBarColor { get; set; } = ActiveTheme.Instance.TertiaryBackgroundColor;
+		public Color SpliterBarColor { get; set; }
 
-		public int SplitterHeigt
+		public int SplitterHeight
 		{
 			get => _splitterHeight;
 			set
@@ -66,14 +67,13 @@ namespace MatterHackers.MatterControl.CustomWidgets
 
 		public override void OnDraw(Graphics2D graphics2D)
 		{
-			graphics2D.FillRectangle(LocalBounds.Left, LocalBounds.Bottom, LocalBounds.Right, LocalBounds.Bottom + this.SplitterHeigt, this.SpliterBarColor);
-			graphics2D.FillRectangle(LocalBounds.Left, LocalBounds.Bottom, LocalBounds.Right, LocalBounds.Bottom + this.SplitterHeigt, Color.Black);
+			graphics2D.FillRectangle(LocalBounds.Left, LocalBounds.Bottom, LocalBounds.Right, LocalBounds.Bottom + this.SplitterHeight, this.SpliterBarColor);
 			base.OnDraw(graphics2D);
 		}
 
 		public override void OnMouseDown(MouseEventArgs mouseEvent)
 		{
-			if (mouseEvent.Position.Y < this.SplitterHeigt)
+			if (mouseEvent.Position.Y < this.SplitterHeight)
 			{
 				mouseDownOnBar = true;
 				mouseDownY = TransformToScreenSpace(mouseEvent.Position).Y;
diff --git a/CustomWidgets/ResizeContainer/LeftResizeContainer.cs b/CustomWidgets/ResizeContainer/LeftResizeContainer.cs
index 235f6ba9b..a3a7a990b 100644
--- a/CustomWidgets/ResizeContainer/LeftResizeContainer.cs
+++ b/CustomWidgets/ResizeContainer/LeftResizeContainer.cs
@@ -40,15 +40,16 @@ namespace MatterHackers.MatterControl.CustomWidgets
 
 		private int _splitterWidth;
 
-		internal LeftResizeContainer()
+		internal LeftResizeContainer(ThemeConfig theme)
 			: base (FlowDirection.TopToBottom)
 		{
 			this.HAnchor = HAnchor.Absolute;
 			this.Cursor = Cursors.VSplit;
-			SplitterWidth = 10;
+			this.SplitterWidth = theme.SplitterWidth;
+			this.SpliterBarColor = theme.SplitterBackground;
 		}
 
-		public Color SpliterBarColor { get; set; } = ActiveTheme.Instance.TertiaryBackgroundColor;
+		public Color SpliterBarColor { get; set; }
 
 		public int SplitterWidth
 		{
diff --git a/PartPreviewWindow/PrinterTabPage.cs b/PartPreviewWindow/PrinterTabPage.cs
index 4135257d5..41cf490fe 100644
--- a/PartPreviewWindow/PrinterTabPage.cs
+++ b/PartPreviewWindow/PrinterTabPage.cs
@@ -163,7 +163,7 @@ namespace MatterHackers.MatterControl.PartPreviewWindow
 
 			var modelViewSidePanel = view3DWidget.Descendants<LeftResizeContainer>().FirstOrDefault();
 
-			gcodeContainer = new LeftResizeContainer()
+			gcodeContainer = new LeftResizeContainer(theme)
 			{
 				Width = printer?.ViewState.SelectedObjectPanelWidth ?? 200,
 				VAnchor = VAnchor.Stretch,
diff --git a/PartPreviewWindow/SelectedObjectPanel.cs b/PartPreviewWindow/SelectedObjectPanel.cs
index 6c0dd51a5..efe0a228d 100644
--- a/PartPreviewWindow/SelectedObjectPanel.cs
+++ b/PartPreviewWindow/SelectedObjectPanel.cs
@@ -290,7 +290,7 @@ namespace MatterHackers.MatterControl.PartPreviewWindow
 			editorPanel.CloseAllChildren();
 
 			// Add the tree view container. eventually we may want to make this a stretch container of some type
-			var treeViewContainer = new BottomResizeContainer()
+			var treeViewContainer = new BottomResizeContainer(theme)
 			{
 				HAnchor = HAnchor.Stretch,
 				VAnchor = VAnchor.Absolute
diff --git a/PartPreviewWindow/View3D/View3DWidget.cs b/PartPreviewWindow/View3D/View3DWidget.cs
index bea2e8d67..99d6ba014 100644
--- a/PartPreviewWindow/View3D/View3DWidget.cs
+++ b/PartPreviewWindow/View3D/View3DWidget.cs
@@ -151,7 +151,7 @@ namespace MatterHackers.MatterControl.PartPreviewWindow
 				VAnchor = VAnchor.Stretch,
 			};
 
-			modelViewSidePanel = new LeftResizeContainer()
+			modelViewSidePanel = new LeftResizeContainer(theme)
 			{
 				Width = printer?.ViewState.SelectedObjectPanelWidth ?? 200,
 				VAnchor = VAnchor.Stretch,