diff --git a/MainWindow.xaml.cs b/MainWindow.xaml.cs
index 2796ce5..6189624 100644
--- a/MainWindow.xaml.cs
+++ b/MainWindow.xaml.cs
@@ -921,7 +921,7 @@ namespace C4IT_CustomerPanel
 
             if (ActiveButton != clickedButton)
             {
-                clickedButton.Background = Brushes.Transparent;
+                clickedButton.Background = System.Windows.Media.Brushes.Transparent;
                 FrameworkElement activeIndicator = GetActiveTabIndicator(clickedButton);
                 if (activeIndicator != null)
                     activeIndicator.Visibility = Visibility.Visible;
@@ -931,7 +931,7 @@ namespace C4IT_CustomerPanel
 
                 if (ActiveButton != null)
                 {
-                    ActiveButton.Background = Brushes.Transparent;
+                    ActiveButton.Background = System.Windows.Media.Brushes.Transparent;
                     FrameworkElement inactiveIndicator = GetActiveTabIndicator(ActiveButton);
                     if (inactiveIndicator != null)
                         inactiveIndicator.Visibility = Visibility.Hidden;
@@ -1724,7 +1724,7 @@ namespace C4IT_CustomerPanel
                 if (!(sender is Button bu))
                     return;
 
-                bu.Background = Brushes.Transparent;
+                bu.Background = System.Windows.Media.Brushes.Transparent;
             }
             catch (Exception exp)
             {