As the title says and the screenshot shows; it may be because the world is technically not a sovereign as far as the universe is concerned but in my mind it would make sense if local universe admins had direct in-game control over world colours and so on regardless of technical classification of the world.
standard worlds cannot support changing block colours unless we also disable the color prestige bonus the way it is disabled on sovereign/creative too.
its on the “list of things we could do” to either just disable it, or make it “different” in some way and then yes you could have standard/exo worlds with colours changed also.
I suppose that makes sense; would there be any way to toggle this with a true/false flag for local universes? I imagine that the colour prestige bonus may make sense in some local universe settings but it might not matter to some people either; wouldn’t matter a lot to me if I was only playing with friends, for example.
Either way, if there’s a way to alter colours and general world settings on world creation instead or through a config – though I’m not finding these anywhere for an already generated world – then it’s all the same in the end. It just seemed to me that the world control would be a very convenient way to do/enable this.