The purple on that R35 is the dogs, we saw a Focus wrapped on Sunday in what I think now may have been very similar to the linky that you have put up on the Volvo. The one thing that struck us both was that it was trying to be purple but was leaning towards pink, however the green and grey/silver element worked really well. Of course I have no way of knowing if it was the same wrap you're considering but would hate it if I was buying purple and got a shade leaning towards pink.
Just my two pennyworth mate, hope this helps, looking forward to seeing yours when it's all done Ian.