Lip fungus or coloration?

[Bl414]

Got a few platys 3 days ago from my LFS, 10g finally finished cycling.
Noticed that on both orange platys some black coloration around the lip, wasn't sure if it was some kind of fungus or just part of the color. I've got one white platy and 2 orange and both of the orange have it.

 

[Homedog98]

Looks like just coloration... Could you get some Closer up pics?

 

[roydooms]

I think those are normal. My brother has 2 and the lips are black and it's been like that since we bought the fish.