<DataGrid.RowHeaderStyle>
    <Style TargetType="DataGridRowHeader">
        <Style.Triggers>
            <DataTrigger Binding="{Binding Type}" Value="1">
                <Setter Property="Background"  Value="DeepSkyBlue"></Setter>
            </DataTrigger>
            <DataTrigger Binding="{Binding Type}" Value="0">
                <Setter Property="Background" Value="White"></Setter>
            </DataTrigger>
        </Style.Triggers>
    </Style>
</DataGrid.RowHeaderStyle>

Type为数据表中某一列
注意：TargetType="DataGridRowHeader"
修改的属性是行头的背景颜色，效果如下：

或者：

<DataGrid.ColumnHeaderStyle>
    <Style>
        <Setter Property="DataGridColumnHeader.Background" Value="DeepSkyBlue"></Setter>
    </Style>
</DataGrid.ColumnHeaderStyle>

Property="DataGridColumnHeader.Background" 不指名DataGridColumnHeader会报错