I just realized that some cars have paint colors that can't be added in TransFender, Loco Low Co., Wheels Arc Angels, or Pay N Spray.
For example, there's a shade of blue on the Sentinel that can't be sprayed on. I'm not sure if these colors are unique to a specific car(s), or if they simply can only be found on the street.
Is there any known color table for these "street" colors? Perhaps one could figure out these colors by examining programming code?