When making a copy of the green card does it have to be black and white or color ?

USCIS does not specify.

USCIS does not indicate whether a color copy or a black and white copy is required. Therefore, you may provide what is available to you. CITATION: Page 3:Section 2.a; http://www.uscis.gov/sites/default/files/files/form/i-90instr.pdf