Thanks for feedback.
Just to clarify - this is is pic of some car i found on web with silver aero kit. Picture was hazy so i bumped contrast a bit for better viewing, but I guess it turned the silver into more white color.

My car still looks stock and kit is unattached, and primed. Before I mounted I wanted to know what people think of possible contrasts.

So the lighter color would be silver/aluminum and black tone would match my paint.

Thanks for your reply

Anyone else?