i was misreading the title of this as Colorful AntiMONY, because of the vol 1 cover depicting color on the character's face, and the fact that antimony is a mineral that's been historically used in cosmetics
but the title is actually AntiNOMY, which is a philosophical position where you hold two beliefs that are each reasonable on their own, but which contradict each other when taken together
since shibata-sensei has written other manga about makeup and cosmetics, i wonder if she chose the title with both ideas in mind.