Really enjoyed customising the css in pi-hole to suit my personal needs. I've recently posted this on reddit, now posting here for visibility after some minor updates. Check out the latest version / follow updates on github.
Install
Type the following commands into SSH, line by line.
Hello I have used the midnight css theme in the web interface version v4.3.2 and have now updated to the web interface version v4.3.3 now I no longer have the midnight theme it is now bright again.