Haha dude if you read the article, you'll see that it's a concept bike. That means it's probably made out of some plastic/clay with a coating/whatever like when you see a concept car in a car show. It's really to just see the shape or idea, the finished version will have a real paintjob if it's something they actually decide to produce.
Haha okay cool, I didn't think you saw the article just spotted the photo. Maybe it's a stealth bike like those airplanes, that could explain the bland paint job hehe.