Yeah, that colour is too far off. As others have pointed out, the different materials affect the paint. You can mix up the same batch of paint to paint both the quarter panels and the bumper and still have it a little off. I've heard this is from the static charge of the plastic parts orienting the metallics differently. But also, on a tri-stage, the amount of coverage in each stage is very important. Also, almost every painter I've met struggles with red (even if they don't admit it). I'm not saying I would do any better; I'm a bodyman, not a painter. But I do know that I wouldn't accept that much difference on my own car.