I mean, I'm gonna take kind of a wild example here but if you happen to follow Dragon Ball, it's kinda like Gogeta. He's been non-canon for decades and his original vest's color scheme was different from Gotenks' (orange vs yellow), but it was changed to match Gotenks' in the recent Broly movie which is his first "canon" appearance. Some fans loved the old "non-canon" orange vest but the change makes sense, there's no reason for the metamoran outfit to be different depending on who are the fusees. Same can be said with Broly too, the character's design and backstory were changed when going from "non-canon" to "canon", even if it retained a lot from his original self. That's kind of the same here. The character started out as a "not really official" palette swap for 2B, but is now introduced as an independent character. They adjusted her skin color to match the other androids so that it fits within the lore of the source material.