I would look for a good painter in your area that can determine the color. When I bought my bike, I sat down with the sales manager and he told me about my paint. He said they custom order most of their paint jobs and choose the colors from catalogs, like PPG, which they did for my bike.
So, it is my understanding that Big Dog really does custom paint. Much different then a car where you only have a few color choices.
Many of our members have more experience with Big Dog's then I do so, lets see what they have to say too.