Thank you for the PM! It looks perfectly normal, quite honestly. The outer pigment is gone is all, but the meat is fine. Very normal to be red in the meddle as it's not been exposed to the air like the outside was (remember that water is 2 parts hydrogen to 1 part oxygen) in the brine containing water. Here's a Qview from a previous post a few years ago on a dried beef I did, after I took it out from the brine: (the original thread -
http://www.smokingmeatforums.com/t/74622/s-o-s-smoked-dried-beef)
Oxygen is detrimental to the appearance of meat. It first "blooms" the meat, then degrades the color to gray, then eventually shades of black, such as long-aged beef. Very normal.
I don't know what amounts of cure and salt in the brine you used, but normally 13 days in my (Pops Brine -
http://www.smokingmeatforums.com/t/110799/pops6927s-wet-curing-brine) would be just fine; that is why I advocate a weaker solution and longer curing times; things come up, bad weather, family issues, rtc., and you need that flexibility in your curing solution. Anything brined in my brine can stay at least 30 days if necessary without harm.
Hope this helps and thank you for asking!
Oh, look at my entire thread and see how it comes out!!