diff --git a/PartPreviewWindow/RunningTaskRow.cs b/PartPreviewWindow/RunningTaskRow.cs
index b8aec4ac8..f1d378747 100644
--- a/PartPreviewWindow/RunningTaskRow.cs
+++ b/PartPreviewWindow/RunningTaskRow.cs
@@ -38,16 +38,17 @@ namespace MatterHackers.MatterControl.PartPreviewWindow
 {
 	public class RunningTaskRow : FlowLayoutWidget
 	{
-		private ProgressBar progressBar;
-
-		private ExpandCheckboxButton expandButton;
-
 		internal RunningTaskDetails taskDetails;
 
+		private ProgressBar progressBar;
+		private ExpandCheckboxButton expandButton;
+		private ThemeConfig theme;
+
 		public RunningTaskRow(string title, RunningTaskDetails taskDetails, ThemeConfig theme)
 			: base(FlowDirection.TopToBottom)
 		{
 			this.taskDetails = taskDetails;
+			this.theme = theme;
 
 			this.MinimumSize = new Vector2(100, 20);
 
@@ -172,6 +173,12 @@ namespace MatterHackers.MatterControl.PartPreviewWindow
 			taskDetails.ProgressChanged += TaskDetails_ProgressChanged;
 		}
 
+		public Color ProgressBackgroundColor
+		{
+			get => progressBar.BackgroundColor = this.BorderColor;
+			set => progressBar.BackgroundColor = value;
+		}
+
 		private void SetExpansionMode(ThemeConfig theme, GuiWidget detailsPanel, bool isExpanded)
 		{
 			expandButton.Checked = isExpanded;
diff --git a/PartPreviewWindow/RunningTasksWidget.cs b/PartPreviewWindow/RunningTasksWidget.cs
index c468216ac..2ecf454c7 100644
--- a/PartPreviewWindow/RunningTasksWidget.cs
+++ b/PartPreviewWindow/RunningTasksWidget.cs
@@ -90,6 +90,8 @@ namespace MatterHackers.MatterControl.PartPreviewWindow
 				}
 			}
 
+			var progressBackgroundColor = borderColor.AdjustAlpha(35);
+
 			// Add new items
 			foreach (var taskItem in tasks.RunningTasks.Where(t => !displayedTasks.Contains(t)))
 			{
@@ -99,6 +101,7 @@ namespace MatterHackers.MatterControl.PartPreviewWindow
 					BackgroundColor = theme.AccentMimimalOverlay,
 					Border = new BorderDouble(1, 1, 1, 0),
 					BorderColor = borderColor,
+					ProgressBackgroundColor = progressBackgroundColor
 				};
 
 				pendingTasksList.AddChild(taskRow);