Click on items in the left hand column to change the colors displayed here.
Eventually, all items will be added and these changing colors will be replaced with changing pngs so you can dress the boy however you like, in whatever colors you like!
This is helpful so you can try on little outfits in every color before wasting your resources dying things!
Also because I have the outfits from both games so you can mix and match just for funsies :)