I have part drawn that I want represented multiple times but as different colors.  The original design was drawn in BLUE.  I want to retain the BLUE color (for the original) but after modifying the part (and saving it as a copy), I want to change the modified piece(s) to another color (RED).

When I change the color of the modified part to RED, it converts the original component to RED as well.

How do I go about changing one without affecting the other?

Thank you!