Changing Blinding Background

I normally use my monitor (Dell 2405fpw) at lower gamma rates because I like
the dimness...easier on the eyes. Recently, however, I color calibrated the
monitor with Greg Macbeth Eye-One 2 Display for image color matching. This
is fine, but now, the system windows (My Computer, control panel, etc.) are
a blinding white.

I can change the 'Window' color in Display Properties, but it has no effect
on these System Windows. Can these colors be changed, or is it an
unchangeable part of the Aero theme?

Thanks!