diff --git a/src/Toolkit/Toolkit.WinUI/UI/Controls/PopupViewer/PopupViewer.Theme.xaml b/src/Toolkit/Toolkit.WinUI/UI/Controls/PopupViewer/PopupViewer.Theme.xaml
index d8af5c136..ad15155df 100644
--- a/src/Toolkit/Toolkit.WinUI/UI/Controls/PopupViewer/PopupViewer.Theme.xaml
+++ b/src/Toolkit/Toolkit.WinUI/UI/Controls/PopupViewer/PopupViewer.Theme.xaml
@@ -5,6 +5,21 @@
xmlns:primitives="using:Esri.ArcGISRuntime.Toolkit.Primitives"
xmlns:popup="using:Esri.ArcGISRuntime.Mapping.Popups">
+
+
+ #FF121212
+ #FF040404
+ #11CCCCCC
+ #FFCDCDCD
+
+
+ #FFEDEDED
+ #FFFBFBFB
+ #11333333
+ #FF323232
+
+
+