Thanks, but that does not seem to work either. It seems that the color set of the tab control, i.e. the edges, the front area etc. is being calculated from the color selection, either by property node or directly. When I check the color of the tab control after copy/paste into a picture editing software I still get only a gray color value of "178" or "180", not the wanted "179". The difference is hardly visible (thus it is not extremely important), but it is there...
Thanks anyway,
Dirk