

Chiming in as the OP, I used rawgraphs.io which only has 2 colour palettes for this amount of data (the first one only covers 7 colors the rest becomes grey), there’s the option to pick your own colours and I considered picking colours from instances logos so they would fit. No idea if that would have been better for accessibility. In general there are colourblind-friendly colour palettes suggestions out there and I should have checked them first!











There is https://lemmy.fediverse.observer/map but I don’t know how accurate it is
edit: it looks completely off at first glance lol