Hello jorgepinto, 

Thank you for posting in our forum. 

For styling issues you can refer to the grid’s styling guide:

http://www.infragistics.com/community/blogs/engineering/archive/2010/08/25/webdatagrid-css-styling-guide.aspx

 Specifically for the column’s header there’s a Header-CssClass property which you can apply to the column. If you set a class that sets the background color for that property for example:

.Red

    {

        background-color:Red !important;

        }

Then the whole header area for that column will be red.

Let me know if you have any questions or concerns.

Best Regards,

Maya Kirova

Developer Support Engineer II

Infragistics, Inc.

http://www.infragistics.com/support