Two questions, curse variations and what exactly seperates seas with each other

So basically, title.

And for a more elaborate explanation, what decides a curse user’s variant/color or can they decide? Is it random? Based on their character? Can they switch between them like a RGB keyboard?

For the other question, no not sea clusters but what makes the Bronze sea different from Nimbus sea and Vimir sea? If it’s Mount Othrys that’s seperating the two then what makes nimbus sea and vimir sea so different or seperates them? The temperature? (well we don’t know what Vimir sea looks like yet). The separated seas seem kinda arbitrary. Other than game features.

Also bonus question, doesn’t it seem like the more west you go the colder it is? Like on the map, Frostmill, Winterveil and the Samerian Ice Mines are all on the west side of the seas, so maybe there’s something there idk.

On second thought, Frostmill, Winterveil and the Ice Mines are def not far enough west to warrant such weather differences. So idk maybe it’s like one piece and the weather is all fucked up in the War Seas cuz of Dark Seas shenanigans?

Curse color is based on personality, queen cornelia had yellow color storm curse as akeem currently has purple color. Not sure what the logic is based off of so

Most likely to do with territories, kingdom territorial lands and history. It’s probably just a virtual agreed on norm at this point canonically. Not sure though

Yeah it’s cuz of the fracture and the dark sea, it was stated in lore document that the weather/temperatures could go from steaming hot to winter cold due to magic radiation (the dark sea)

i’m pretty sure a curse user who’s skilled enough can change the color variation of their curse at will, although when they first absorb it, it is based on their personality (no idea which personality traits affect what)