Except its not that easy to do, only changing the pattern doesnt seem to work, you get this
now the color is in uxtheme.dll but there is no god damn way you could make it transparent (at least with my HEX Editing skills, which arent that great)
You don't have to worry about the center pattern anymore.
View attachment 7934
I am aware of that but for me its really buggy and unusable, makes metro and other desktop apps fail. Id stay on trying to remove the center color
Charms color can be easly changed with HEX Editor to by the way