qole,

Initially, it seemed like those who didn't like the new theme wanted the black theme back. And then later on, just like you, a lot have been asking about the classic blue theme.

If only a single member now wants the dark theme back, I don't see the reason why we need to bring it back. The more the themes, the harder it is to upgrade the forum since each theme needs to be validated, add-ons tested, and forum integration with other systems checked.