TFrame fill color

I have just upgraded from 5.18/0 to 5.21/06 on windows running vista. Evidently the TFrame displayed now has color = 19. (gPad->GetFrame()->GetFillColor()) - sort of off white. If I ry to change this color - it seems to stay stuck at 19. What is the proper way to adjust the background color? Thanks!
Ed

I suggest:

   gStyle->SetCanvasColor(0);
   gStyle->SetFrameBorderMode(0);
   gStyle->SetStatBorderSize(1);
   gStyle->SetFrameFillColor(0);
   gStyle->SetTitleFillColor(0);