Kegged up a saison about two weeks ago. Tapped it today and it has gotten darker in the keg. And it just doesn't taste right. The color is weird, like it has raspberries or something in it.
The keg was clean and sanitized and still had starsan foam in it, so I know there wasn't any other beer in there.
I saved the yeast slurry and took a side by side photo of the beer from the keg and the beer from on top of the slurry. The beer from the slurry still tastes great, so whatever happened went wrong in the keg.
Any one have any ideas? What sort of infection will make a beer darker?
I'm going to brew this saison again, but with the weirdness once kegged I'm not sure I should use the yeast slurry.