This thought came to me, because I have noticed that most of the pages for color palettes are outdated, as the item lists on them are to be updated by hand.

This feels incredibly inefficient given that most new cosmetics come in a lot of existing colors plus sometimes new ones.
I think this would also be of great use for other things than color palettes, like dynamically adding new items to their parent category (like for common accessories in new color schemes, or say new armors in a recipe chain, etc...)