Gokū’s body glows with blue energy, which bursts off of him with a blazing light. His hair flows up like that of a Super Saiyan, but is colored to match his divine power.

I don’t know if you have the patience for the full story, but I got a taste of something called Super Saiyan God, and then tapped into that power on my own, and it's the Super Saiyan level of that. So I guess this would be Super Saiyan God Super Saiyan. …Well, that’s too long, let’s just call it Super Saiyan Blue for short!