This past weekend I saw what is an abject lesson in why proper prep work and quality paint is critical for this mod. I saw a red MS3 in a parking lot with painted calipers that were flaking. It might have looked great at one time, but it was hideous yesterday.
That color on Halo's car is called Grabber Orange on G2's site. It is in the Mustang color group. I have that color on my calipers as well. It actually looks orange as where the G2 orange looks more brick read.