BlankPage2.xaml

<?xml version="1.0" encoding="utf-8"?>
<Page
    x:Class="VisualStateRepro.BlankPage2"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:VisualStateRepro"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d">

    <Grid>

        <VisualStateManager.VisualStateGroups>

            <VisualStateGroup>

                <VisualState>

                    <VisualState.StateTriggers>

                        <AdaptiveTrigger MinWindowWidth="700"/>

                    </VisualState.StateTriggers>

                    <VisualState.Setters>

                        <Setter Target="Page2TextBlock.Foreground" Value="Orange"/>

                    </VisualState.Setters>
                    
                </VisualState>
                
            </VisualStateGroup>
            
        </VisualStateManager.VisualStateGroups>

        <TextBlock Foreground="Purple" Style="{StaticResource TitleLargeTextBlockStyle}" x:Name="Page2TextBlock" Text="This text is purple when below the threshold"/>

    </Grid>
</Page>