Orange pork fat

I've noticed that pork fat that has been processed somehow (pepperoni, tamales, not bacon) has a distinct orange color, both in liquid and solid form (it is saturated). After trying unsuccessfully Googling a variety of terms related to it, I'm coming up blank, so I'm asking you this question.

Speaking of unhealthy foods, I'm thinking about some sort of McDonald's related blog (about restaurants, food, etc.) or website, which has been in planning for about two years, but I still can't decide if I want it to be a blog or website. I know I had written about the local ones, so I do have some ideas.

EDIT: It appears that the pepperoni fat is spicy in itself.