Dark Color On Sausage

[Ba275]

I see some darkened color on my sausage. What is this ? Why it happens ? Is it safe ?

I appreciate the input from masters.

[redzed]

At this point I would not be concerned, it may have been touching something or just drying unevenly. We need more more info about your process.

[Indaswamp]

Did you use some variety of red pepper flakes? I just made some calabrese and had the same concern until I realized it was just pepper flakes that had not been crushed finely.