Edit: Disregard. Read “crumbed” as “crumbled” and thought OP was referring to ground meat/mince. I still think my reply has some interesting info, so I’ll leave it.
I couldn’t find any pics of what you’re talking about, so if you have one, I’d be curious to see it.
From my searching though, I saw that grass fed beef, which would be the “good stuff” has yellow fat instead of white, so when that is minced it will likely coat the meat with that, giving it a slight tint.