Is there a way to change the "Genesis" Theme Color from Blue to Green?

I have the whole project set up quite nicely in the "Genesis" Theme set of slides.

And I've been told that my manager wants it Green.
Is there any way just to change that color to green and keep the same layout?

In other words.. (though I think you understand my question already) ...

In Powerpoint for mac 2011 there is a Theme style called "Genesis" that has curvy color "shapes" that cover portions of the backgrounds of each slide. I like, and have used those colored areas as dividers of a sort from one bit of info to another, so I don't want to change the layout of any slide... Just the color of the shape from Blue to Green.

Whatever I have tried seems to change the entire slide.. not just the portion that Genesis provides in Blue.

Is there no way to change that color?

Please advise.. I will really appreciate it.