Question 1:
It takes on the hue of the material whether you craft it with the material, or you enhance it with the material as seen here:
A is crafted with verite directly, B is crafted with "iron" and then enhanced to verite, and C is the default color of the "iron" granite.
Question 2:
When crafted with DC there is no +% durability bonus, and when enhanced there is no +% durability bonus granted.

Also feel free to message me directly if you need other things tested. I don't always have the time, but I don't mind helping get things fixed.