I'm not an expert, so I have to look this stuff up, but I am finding different historical info on the flags. Let me link you out.Continuing my 2300AD/Planet Joi mini project, may I please request a flag for the German Colony on that world? (Named 'Halbinsel' aka 'Penninsula').
Now this colony was established by a primarily Hanoverian population - in the 2300AD setting Germany only reunited relatively recently, since the timeline diverged from our own because some madman triggered World War III sometimes in the 1980s/1990s over the vexed matter of German Reunification - so my suggestion would be to use a red & white flag (since there are strong Polish & Austrian elements in the population and the Flag of Hanover did have red & white elements back in the day).
I rather like the idea that this flag would be primarily red, with white insets forming a stylised 'H' (my initial thought was that this H would be laid on its side, with the long arms stretching from left to right, rather than from top to bottom of this flag; further research has revealed that one old flag of Hanover featured a castle, which suggests a possible alternate composition, with the upright 'H' being used in place of the castle - I leave this choice at the artist's discretion).
Thank You most kindly in advance for your consideration; I hope that all the creators and all my fellow fans of this thread are keeping well in the middle of this Quarantine!
https://en.wikipedia.org/wiki/Kingdom_of_Hanover
https://www.crwflags.com/FOTW/flags/de-ha_hi.html
Let me know if that changes your take on where you want the flag to go.