You could set the LabelPresenterStyle the same way as you did for the CellValuePresenter e.g:

<igDP:FieldSettings>

<igDP:FieldSettings.LabelPresenterStyle>

<Style TargetType="{x:Type igDP:LabelPresenter}">

<Setter Property="Background" Value="Blue"/>

</Style>

</igDP:FieldSettings.LabelPresenterStyle>

</igDP:FieldSettings>

Hope this helps.

Now..If i set LabelPresenter ..then it chagne header of all columns.But..our need is differe

If i want to do it alternately ...e.g. in below example

----Degree our Field backgroud will be Blue

----FirstNameour Field backgroud will be Red..I want to set header's style same as field..

 <igDP:Field Name="Degree" Label="Degree" >
                                        <igDP:Field.Settings>                                           
                                            <igDP:FieldSettings>
                                                <igDP:FieldSettings.CellValuePresenterStyle>
                                                    <Style TargetType="{x:Type igDP:CellValuePresenter}" >
                                                        <Setter Property="Background" Value="Blue"/>
                                                        <Setter Property="BorderBrush" Value="#FFDFDFDF"/>
                                                        <Setter Property="BorderThickness" Value="0.5"/>
                                                    </Style>                                                   
                                                </igDP:FieldSettings.CellValuePresenterStyle>                                               
                                            </igDP:FieldSettings>                                           
                                        </igDP:Field.Settings>

                                    </igDP:Field>
                                    <igDP:Field Name="FirstName" Label="FirstName">
                                        <igDP:Field.Settings>
                                            <igDP:FieldSettings>
                                                <igDP:FieldSettings.CellValuePresenterStyle>
                                                    <Style TargetType="{x:Type igDP:CellValuePresenter}" >
                                                        <Setter Property="Background" Value="Red"/>
                                                        <Setter Property="BorderBrush" Value="#FFDFDFDF"/>                                                       
                                                        <Setter Property="BorderThickness" Value="0.5"/>
                                                    </Style>
                                                </igDP:FieldSettings.CellValuePresenterStyle>                                              
                                            </igDP:FieldSettings>
                                        </igDP:Field.Settings>
                                    </igDP:Field>
                                </igDP:FieldLayout.Fields>

For changing the background of the headers you can define custom style for the LabelPresenter similar to this:

<Style TargetType="{x:Type igDP:LabelPresenter}">

            <Setter Property="Background" Value="Azure"/>

</Style>

The you could set it to your desired fields using the LabelPresenterStyle property.

All the GRID header are gray background..

we want to set backgroud as per column name..so for that also..we plz suggest best way to do it?