Glad to hear that worked. Let me know how things go moving forward.

OK it started working when i moved <style? blocks from USerControl.Resources to XamDataGrid.Resources. 

Thanks for help

Nope sorry doesn't work. I think this has something to do with default theme which uses gradient for celected cell background brush. See pic below.

My code:

    <UserControl.Resources>
        
        <Style TargetType="{x:Type igDP:DataRecordCellArea}">
            <Setter Property="BackgroundHover" Value="#F7914B"/>
            <Setter Property="BorderHoverBrush" Value="#F7914B"/>
            <Setter Property="BackgroundSelected" Value="#EC660A"/>
            <Setter Property="BackgroundActive" Value="#EC660A"/>
            <Setter Property="BorderBrush" Value="Black"/>
            <Setter Property="BorderThickness" Value="0.5"/>
            <Setter Property="BackgroundAlternate" Value="#dcdcdc"/>
            <Setter Property="CornerRadius" Value="0"/>
        </Style>

        <Style TargetType="{x:Type igDP:CellValuePresenter}">
            <Style.Triggers>
                <Trigger Property="IsActive" Value="True">
                    <Setter Property="BackgroundActive">
                        <Setter.Value>
                            <SolidColorBrush Color="#EC660A"/>
                        </Setter.Value>
                    </Setter>
                </Trigger>
            </Style.Triggers>
        </Style>


        <Style x:Key="{x:Type igDP:FilterCellValuePresenter}"
                       TargetType="{x:Type igDP:FilterCellValuePresenter}">
            <Setter Property="BorderBrush" Value="Black"/>
            <Setter Property="BorderThickness" Value="0.5"/>
            <Style.Triggers>
                <Trigger Property="HasActiveFilters"
                                 Value="true">
                    <Setter Property="Background">
                        <Setter.Value>
                            <SolidColorBrush Color="#EC660A"/>
                        </Setter.Value>
                    </Setter>
                </Trigger>
            </Style.Triggers>
        </Style>
    </UserControl.Resources>


        <igDP:XamDataGrid Grid.Row="1" Name="_componentsTable" 
                          RecordFilterDropDownPopulating="_componentsTable_RecordFilterDropDownPopulating"
                          DataSource="{Binding Components}"
                          SelectedDataItem="{Binding Path=SelectedComponent, Mode=TwoWay}" 
                          SelectedDataItemsScope="RecordsOnly"
                          GroupByAreaLocation="None"
                          BorderBrush="#688caf" 
                          BorderThickness="1">

            <igDP:XamDataGrid.Resources>
                <ContextMenu x:Key="ContextMenu" DataContext="{Binding PlacementTarget,RelativeSource={RelativeSource self}}">
                    <MenuItem Header="Copy" Command="{Binding Path=DataContext.CopyDrillStringComponentCommand, 
                                                        RelativeSource={RelativeSource AncestorType={x:Type igDP:XamDataGrid}}}"/>
                    <MenuItem Header="Paste" Command="{Binding Path=DataContext.PasteDrillStringComponentCommand, 
                                                        RelativeSource={RelativeSource AncestorType={x:Type igDP:XamDataGrid}}}"/>
                </ContextMenu>
                
                <Style TargetType="{x:Type igDP:CellValuePresenter}">
                    <Setter Property="ContextMenu" Value="{StaticResource ContextMenu}"/>
                    <Setter Property="BorderThickness" Value="0.5"/>
                    <Setter Property="BorderBrush" Value="Black"/>
                </Style>
            </igDP:XamDataGrid.Resources>

            <igDP:XamDataGrid.InputBindings>
                <KeyBinding Command="{Binding Path=DataContext.DeleteSelectedComponentCommand, 
                                        RelativeSource={RelativeSource AncestorType={x:Type igDP:XamDataGrid}}}"
                            Key="Delete"/>
                <KeyBinding Command="{Binding Path=DataContext.DeleteSelectedComponentCommand, 
                                        RelativeSource={RelativeSource AncestorType={x:Type igDP:XamDataGrid}}}"
                            Key="Back"/>
            </igDP:XamDataGrid.InputBindings>

            <igDP:XamDataGrid.FieldSettings>
                <igDP:FieldSettings AllowRecordFiltering="True" 
                                    AllowGroupBy="False"
                                    FilterOperatorDropDownItems="None"
                                    IsAutoEditModeEnabled="True" 
                                    CellClickAction="SelectCell"/>
            </igDP:XamDataGrid.FieldSettings>
            
            
            and so on

Nope. Same result. 

I tried "IsSelected" and "IsActive" as trigger properties. No luck. 

        <Style TargetType="{x:Type igDP:CellValuePresenter}">
            <Style.Triggers>
                <Trigger Property="IsSelected" Value="True">
                    <Setter Property="BackgroundActive">
                        <Setter.Value>
                            <SolidColorBrush Color="#EC660A"/>
                        </Setter.Value>
                    </Setter>
                </Trigger>
            </Style.Triggers>
        </Style>