Be careful what you wish for.
Wow what I never realized the colors were inverted
You’d think I would have noticed that
That’s the point. The world Coraline lives in is supposed to be boring and gray, but the people are what give it life and purpose. In the Other Mother’s world the people are plastic puppets where she pulls the strings because it presumably changes for every child she takes, but the world around them is bright and colorful for the purpose of enticing the children to stay… before they notice the inhabitants are nothing but dust.