How to edit Mahapps.Metro in Blend?

Question

WPF

Good afternoon, our developers use Mahapps.Metro by default in their programs, we want to switch to a different look, lighter, more pleasant and calm, so we are thinking how to change the style.
Please tell me if it is possible to somehow create a duplicate of Mahapps.Metro in which to change all the controls in your own way, and then simply change to another in the application.
If possible, can it be done in Blend?

Answer 1

Download sources and open in blend?

Answer 2

Can.