From 9d3ef2de317319e2f6ee8203bc6ca7a2f95ed848 Mon Sep 17 00:00:00 2001
From: Dan Walmsley <dan@walms.co.uk>
Date: Thu, 2 Jul 2020 15:16:36 -0300
Subject: [PATCH] set transparency fallback based on theme.

---
 src/Avalonia.Themes.Fluent/Window.xaml | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/Avalonia.Themes.Fluent/Window.xaml b/src/Avalonia.Themes.Fluent/Window.xaml
index aee15347eb..f279436b67 100644
--- a/src/Avalonia.Themes.Fluent/Window.xaml
+++ b/src/Avalonia.Themes.Fluent/Window.xaml
@@ -1,5 +1,6 @@
 <Style xmlns="https://github.com/avaloniaui" Selector="Window">
-  <Setter Property="Background" Value="{DynamicResource SystemControlBackgroundChromeMediumBrush}"/>
+  <Setter Property="Background" Value="{DynamicResource SystemControlBackgroundChromeBlackHighBrush}"/>
+  <Setter Property="TransparencyBackgroundFallback" Value="{DynamicResource SystemControlBackgroundChromeBlackHighBrush}"/>
   <Setter Property="Foreground" Value="{DynamicResource ThemeForegroundBrush}"/>
   <Setter Property="FontSize" Value="{DynamicResource FontSizeNormal}"/>
   <Setter Property="Template">