Hi Julio,

Both the core Table and datagrid's DataTables widgets has a property called cssClass which allows you to add custom css classes to your headers, rows:

https://www.koolreport.com/docs/datagrid/datatables/#set-cutom-css-classes

After using that you could add css rules to set font and background colors for your certain headers, rows. Let me know if you need further help. Thanks!