I like it, but would you consider toning the color scheme a little down? Or maybe be a bit more sparing with color? The massive field of bright pink smacked me in the eyes when I opened it up. A good documentation theme should get out of the way so the reader can focus on the text rather than the colors.
That color is mostly a placeholder, and in the actual theme you'll be able to change the color scheme in the site configuration (without needing to touch CSS).
I agree that aesthetics are absolutely CRUCIAL and this will be a MAJOR focus of the project.
