I think most of us that like dark colours use this theme by @valeth
While I’m here, since this is yuor first post…
\textcolor{pink}{\huge \textsf{WELCOME! ^-^}}
Take the time to check out the FAQ and GUIDE if you haven’t already.
There’s also a lot of good stuff on the forum to help you, like:
The Ultimate Guide for WK
The Ultimate Additional Japanese Resource List
The New and Improved List of API and Third-Party Apps
I hope your Japanese learning journey goes well and that you enjoy your time with us on the forums.