DataTrigger properties on child controls

I would like to be able to change the TextColor of the label in response to the pressed state of the ContentView (similar to the sample here). When TouchEffect was previously a control, I did something like this:

...
<touch:TouchView x:Name="touchView">
<Label>
     <Label.Triggers>
          <DataTrigger Binding="{Binding Source={x:Reference touchView}, Path=State}" TargetType="Label" Value="Pressed">
               <Setter Property="TextColor" Value="Red" />
          </DataTrigger>
     </Label.Triggers>
</Label>
</touch:TouchView>

Now that it’s an effect, I tried doing something like this but no luck:

<Label.Triggers>
     <DataTrigger Binding="{Binding Source={x:Reference ContentViewName}, Path=(touch:TouchEff.State)}" TargetType="Label" Value="Pressed">
          <Setter Property="TextColor" Value="Red" />
     </DataTrigger>
</Label.Triggers>

[AndreiMisiukevich]

Then only:

    <StackLayout>
        <ContentView Padding="200"
                     x:Name="content"
                     touch:TouchEff.PressedBackgroundColor="Red"
                     touch:TouchEff.RegularBackgroundColor="Green"
                     HorizontalOptions="CenterAndExpand"
                     VerticalOptions="CenterAndExpand">
            <ContentView.Effects>
                <touch:TouchEff Completed="Handle_TouchCompleted"/>
            </ContentView.Effects>

            <ContentView.Triggers>
                <Trigger Property="touch:TouchEff.State" Value="Pressed" TargetType="ContentView">
                    <Setter Property="ClassId" Value="Pressed" />
                </Trigger>
            </ContentView.Triggers>

            <Label FontSize="60"
                   HorizontalOptions="Center"
                   Text="CLICK ME"
                   TextColor="White"
                   VerticalOptions="Center">
                <Label.Triggers>
                    <DataTrigger Binding="{Binding Source={x:Reference content}, Path=ClassId}" TargetType="Label" Value="Pressed">
                        <Setter Property="TextColor" Value="Red" />
                    </DataTrigger>
                </Label.Triggers>
            </Label>
        </ContentView>
    </StackLayout>

[AndreiMisiukevich]

https://stackoverflow.com/questions/42544575/binding-to-attached-properties-in-xamarin-forms

Impossible to bind to attached property