extend Mobile-Bumped and Mobile-BumpedSpec.shader with color

I would like to change the color of a material during runtime. So for example, I got a white leather material and on a button click, the material should be e.g. red leather. As I look for similar stuff inside the forum here, I’ve seen properties like “_Color” “_TintColor” and “_ColorTint”.
Now I absolutely don’t know which one to use and how to extend the shaders. Could someone extend it please with a small explanation?

Mobile-Bumped.shader:
http://pastebin.com/dwtGztGA

Mobile-BumpedSpec.shader:
http://pastebin.com/vp12pgnZ

okay solved it with the final color modifier, described in the “Final Color Modifier” section here: Unity - Manual: Surface Shader examples