single cell background color in WPF Datagrid not all row color

Question

I have write this code to change the color of a cell in WPF mydatagrid, but as result i have all the row colored and i don't know why.

Style style = this.FindResource("backColor") as Style;
DataGridClientFile.CellStyle = style;


<Style x:Key="backColor" TargetType="DataGridCell">
                <Style.Triggers>
                    <DataTrigger Binding="{Binding Path=Colore}" Value="Red">
                        <Setter Property="Background" Value="Red"/>
                        <Setter Property="Foreground" Value="White"/>
                    </DataTrigger>
                    <DataTrigger Binding="{Binding Path=Colore}" Value="Green">
                        <Setter Property="Background" Value="Green"/>
                        <Setter Property="Foreground" Value="White"/>
                    </DataTrigger>
                    <DataTrigger Binding="{Binding Path=Colore}" Value="Yellow">
                        <Setter Property="Background" Value="Yellow"/>
                    </DataTrigger>
                    <DataTrigger Binding="{Binding Path=Colore}" Value="Cyan">
                        <Setter Property="Background" Value="Cyan"/>
                    </DataTrigger>
                    <DataTrigger Binding="{Binding Path=Colore}" Value="White">
                        <Setter Property="Background" Value="White"/>
                    </DataTrigger>
                </Style.Triggers>
            </Style>

Answer 1

Here the solution :

Style style = this.FindResource("backColor") as Style;
Style styleNX = this.FindResource("backColorNX") as Style;
if (DataGridClientFile.Columns.Count >= 14)
            {
                DataGridColumn col = DataGridClientFile.Columns[14];
                col.CellStyle = style;
                DataGridColumn colNX = DataGridClientFile.Columns[15];
                colNX.CellStyle = styleNX;
            }