Change Colour of a Material?

[Dylan]

I am using the Library material NK Zinc on a model and it is perfect for my needs.
I want to have some of my zinc panels to be a darker shade of zinc, so I wanted to know how I can achieve this. I like the quality of this library mat, I just want a darker version of the same.

[Fletch]

:>: This is a perfect thread here.

basically... export material as .xml, open in Kerkythea, edit material, save as new library, save library file into Twilight's Materials folder.
re-open SketchUp.