White Labs Yeast Color - Significantly Darker

[Asator]

Hello, I received these three yeast packs from MoreBeer today. The two that are darker in color seem to be from a slightly older batch than the one that looks normal. I did knead all three slightly to make sure the color issue wasn't from settling or something similar. All were shipped together with an ice pack, so I don't believe that is the issue. Thoughts?

 

[Vale71]

Yeast, much like any other foodstuff, does change color with time.

 

[kh54s10]

I would suspect it is due to age but it could also just be the color of the wort that they packaged the two different batches in.

 

[BrewingAroundtheRrealm]

I have seen this before. Nothing to be worried about.