Changing Windows Vista/7's Transparency Color

Ok, so I've heard that the color Microsoft decided to use for there Transparency is Black. Which would explain why black text is invisible when drawn/placed onto a Glass surface.

Wouldn't it just make sense for us to change the transparency color (black) BACK to Magenta? Why didn't they do this again? Is it even pos开发者_如何学编程sible to change this color?

I'm not sure about chainging the transparent color, but you could render #010101 text and it should be dark enough for black, no? On a glass surface pure black could be hard to see anyway.