This reminds me of a Dilbert cartoon where PointyHeaded boss asks him to create a new database, and Dilbert asks him what color should it be. Sorry - couldn't resist.
Anyways, closest thing I can think of is if you are using forms, to set the ForeColor property of the labels and textboxes.
But there's no way that I know of to make a global setting to say "if it comes from table A, make it appear in blue".