It's just white plastic. I plan to paint mine.
I got it for my project TZ which I'm waiting for the cold weather before 'crossing over in to the zone' and starting. That's a story for another day.
I see the power ball in my pin is light tan with brown crackle like marbling. For some reason, I though it was more blue/purple mother of pearl colored. Not sure where I got that idea, I checked the power ball in pinball arcade which is also light tan. Well maybe I will paint my shooter rod mother of pearl colored anyway.