Why does my pullets comb look like this?

[Waldorf Woods]

My pullet’s comb has been turning blackish gray over the past two weeks. She is still laying every single day and behavior still seems completely normal. This is all new to me, so any thoughts and advice are appreciated.
Thanks!

 

[Wyorp Rock]

Welcome To BYC

Do you know the breed?

Looks like some of it may be a bit of dirt, but she has some Mulberry coloring which would be normal, often as they mature, the color gets a bit deeper.

 

[Ridgerunner]

My first thought is dry fowl pox, a viral disease. Sometimes it affects their egg laying and behaviors, sometimes not. It is usually not life threatening, they should get over it in a few weeks. If it is fowl pox expect it to get worse before it gets better.