It's all fairly straightforward to customize via the CSS. There is also a second theme provided which is a bit brighter, this site from the directory uses it.
Welcome to the Q&A site for Question2Answer.
If you have a question about Q2A, please ask here, in English.
To report a bug, please create a new issue on Github or ask a question here with the bug tag.
If you just want to try Q2A, please use the demo site.