C1FlexGridGroupPanel Question about styling

Hi,

I’m trying to add styling to my C1FlexGridGroupPanel, and I have the following questions:

1) Is it possible to style the watermark text? (fontfamily, textcolor)
2) Is it possible to style the borders of the group panel?

Currently, my grouppanel is bound to the C1FlexGrid. It seems that the watermark color is directly inherited from C1FlexGrid.ColumnHeaderForeground. Is it possible to break that inheritance?

Thanks