Why does Goku’s hair turn gold when he becomes a Super Saiyan?
I decided on the design for the Super Saiyan for, to be honest… a simple reason that will leave you saying “What?”. I always have only a single person, Assistant-kun3, helping me with my work. That Assistant-kun’s time was always taken up doing the black fill4 of Goku’s hair, so the biggest reason was in order to save time. Because when he became a Super Saiyan, we wouldn’t have to do the black fill. It also had the effect of making it easy to tell from his appearance that Goku had gotten stronger, so it killed two birds with one stone. Only, at the time, it was considered that his strength would increase 50-fold when he became a Super Saiyan, but that was a bit of an exaggeration. My feeling as the creator is that, while drawing it, I felt that it was about a 10-fold change from what it was up to that point.