Chrysler would've used whatever was the least-expensive option available to them that would get the car past its warranty period
Engine would all be one color, and things would also generally be as quick & easy to assemble as possible.
That said, it's a clean installation with obviously a lot of thought applied.

I think painting the fender flanges would be a nice finishing touch; everything else is so clean .
Honestly, I think the interior should either be blue or black, and not a mix of the two colors, but those are just my (unsolicited) opinions.