It would be very handy to have a way to dump all the biome colours from a world to some kind of palette in a png file. That would make doing a map with FromImage mode so much easier, it's hell doing it by hand with 90 odd biomes - let alone the 450+ in Biome Bundle.

It would need to include the biome names, as well as a swatch of the relevant colour. Bonus points for identifying and flagging duplicates when trying to dump the colour set.

I'm not sure how popular or useful this request would be, as I have no idea how many folks use FromImage mode.