Vintage scooter helmets can have nice vivid colors. Stars and stripes are usually taped over the helmets to give a more artistic look. Celebrities often wear vintage scooter helmets when they drive their vintage vespa scooters.
You can find the flag of England from a vintage scooter helmet or you can have racing stripes over you helmet. It's always great way to stand out from people with a personal looking vintage helmet. Be aware that usually old vintage helmets are not the safest helmets because the age of the helmet reduces the protection that helmets provide.