Changing the background color upon click of a checkbox

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C#

WPF

Hello ,
I am having a data grid which has a checkbox column and is binded to a property "Used". The foreground color is binded to this property.

his works fine when I do not add any more condition

<toolkit:DataGrid.RowStyle>
                    <Style TargetType="{x:Type toolkit:DataGridRow}">
                        <Style.Triggers>
                            <DataTrigger Binding="{Binding Used}" Value="True">
                                <Setter Property="Foreground" Value="Green"/>
                                <Setter Property="Background" Value="LightSlateGray"/>
                                <Setter Property="ToolTip"    Value="This Observation is Selected."/>
                            </DataTrigger>
                            <DataTrigger Binding="{Binding Used}" Value="False">
                                <Setter Property="Foreground" Value="Red"/>
                                <Setter Property="Background" Value="Black"/>
                                <Setter Property="ToolTip"    Value="This Observation is Observed."/>
                            
                            </DataTrigger>
                        </Style.Triggers>

This grid is being populated and Used is a checkbox Column in this grid.
This works fine , based on cetain condition some rows become red and some green.
i.e if i>10 then Used = true
else Used = false

Now with this existing set , if the user decides that though i==8, still he would like that row to change the background color but this time to orange to indicate that this was manually forced.

How do I change the color of the row based on this .

Can somebody please help.

Thanks
BV