Holden Monaro chop

Hey guys im working on a new chop and i need some help. I put a different rear bumper on my chop but i dont know how to match the color to the rest of the car can sum1 help.

original:
http://images5.theimagehosting.com/monaro chop.jpg


work in progress:
http://images5.theimagehosting.com/monaro chop.1.JPG

make sure you fix that rear bar up, its too straight.

yeah i noticed that it was a little off, i figured out how to match the colors so i dont need help on that anymore.