diff --git a/src/Calculator/App.xaml b/src/Calculator/App.xaml
index e2a61fc1..c490d6e6 100644
--- a/src/Calculator/App.xaml
+++ b/src/Calculator/App.xaml
@@ -958,7 +958,7 @@
                                                     <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource AppControlBackgroundTertiaryBrush}"/>
                                                 </ObjectAnimationUsingKeyFrames>
                                                 <ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="Foreground">
-                                                    <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource AppControlForegroundSecondaryBrush}"/>
+                                                    <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource TextFillColorSecondaryBrush}"/>
                                                 </ObjectAnimationUsingKeyFrames>
                                                 <ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter" Storyboard.TargetProperty="BorderBrush">
                                                     <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource ToggleButtonBorderBrush}"/>