[AccessD] Background color on a tab control

How can one set the background color on a tab control?  I have a form 
with a tab control with four pages that is not the same color as the 
form's detail section.  I haven't looked at this form for a while, but 
my recollection is that the form detail section and the tab control were 
the same color - now they are not - and I do not find an appropriate 
property for changing the tab control's background color.  What am I 
missing here?
TIA for any help,
Tina