How to color the gridlines of a datagrid column

Yes, ur right there on such  property(gridlinevisibility) for DatagridTextcolumn,this is only for whole datagrid.

So you want to hide tht gridline which occures on datagrid column you can use
Cell style of DataGridTextColumn as follow,Make cell of tht column gray as you want

           
                CellStyle="{StaticResource HodingCellstyle}">
                   
               
           
       

Hope this will help you.

Thanks.

MainPage.xaml

        GridLinesVisibility="None" >