The following xaml demonstrates the issue:

<Grid

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"

xmlns:ei="http://schemas.microsoft.com/expression/2010/interactions">

<Grid.Resources>

<SolidColorBrush x:Key="greenBrush" Color="#FF0A9F26" />

<SolidColorBrush x:Key="purpleBrush" Color="#FF8E0795"/>

<SolidColorBrush x:Key="orangeBrush" Color="#FF913B00" />
<ControlTemplate x:Key="temp" TargetType="ContentControl">
    <Canvas Width="200" Height="100">
        <i:Interaction.Triggers>
            <ei:DataTrigger Binding="{Binding Offset}" Value="1">
                <ei:ChangePropertyAction TargetName="bd" PropertyName="Background" Value="{StaticResource purpleBrush}"/>
            </ei:DataTrigger>
            <ei:DataTrigger Binding="{Binding Offset}" Value="2">
                <ei:ChangePropertyAction TargetName="bd" PropertyName="Background" Value="{StaticResource orangeBrush}"/>
            </ei:DataTrigger>
        </i:Interaction.Triggers>
        <Border Name="bd" Background="{StaticResource greenBrush}" Padding="20,10">
            <TextBlock Text="{Binding Color, FallbackValue=#FF0A9F26}" FontSize="32"/>
        </Border>
    </Canvas>
</ControlTemplate>

<GradientStop x:Key="ctx1" Offset="1" Color="#FF8E0795"/>
<GradientStop x:Key="ctx2" Offset="2" Color="#FF913B00"/>
</Grid.Resources>
<StackPanel HorizontalAlignment="Center" VerticalAlignment="Center">

<ContentControl Template="{StaticResource temp}"/>

<ContentControl Template="{StaticResource temp}" DataContext="{StaticResource ctx1}"/>

<ContentControl Template="{StaticResource temp}" DataContext="{StaticResource ctx2}"/>

</StackPanel>
</Grid>