Hello Ralph,
Of course you can control frame's color.
1. Run filter.
2. Press "Edit profile button"

If you want to change color for all frame, check radio button "Whole frame" inа "Apply effect to" group.
Choose any pre-defined material or create new material:
a) Press "+" button under material name and type any new name


Just now you can set any color, lighting and texture setting.
You can see result in the air at pressing "Apply" button in main filter's dialog.

If you want to change color for single element, check radio button "Baguette Element" inа "Apply effect to" group and choose edited element (left, up, button, right) and desirable profile element.
Regrads, Dmitry