What Type of Budgie Do I have?

I realize I have the traditional budgerigar, but what I want to know is what, I guess, color variation my budgie/parakeet is. Obviously this is my first budgie, so I don't know the lingo or all the details, but here is my description: he's very slim and small (but that may be due to his young age), not pudgy like most, and he's almost completely white. He has blue splotches on his chest and belly, but that's all. He has the black bars on top of his head, cheeks, and around his neck, but nowhere else. He does have black spots on his back, though and right at his shoulder blades where his wings begin. However, the back of his wings and tail feathers are completely white. He has a blue spot on his rump, though, right above his tail. And on the underside of his tail he has two base feathers that end in black tips. That is it, though. He's basically all white save for the blue splotches on his chest and belly. If there are too many color variations to determine what he could be, though, I kind of understood that, but I was just wondering if there was a specific name for what I have. Any additional info would be great, though! I love learning about animals! Sources are great, too.