And that's the problem I have. Heck, Col. Worf even said that Col. West's blood wasn't Klingon, presumably based solely on the colour. So, yeah, there's all sorts of canon problems, either way you look. If it's red, then a major plot point of TUC makes no sense. If it's dark pink or lavender, what about all the times it was red?
My point, though, was that the blood in that scene looked identical to the blood that came out of a human body, even though that one shot that I saw had albino skin. Given that Vulcan blood has undergone several different tint changes--green, lime green, whatever--we cannot be sure that what we were seeing was, indeed, what actually happened. It might have been, for all we know, L'Rell attempting to brainwash Ash after whatever happened to Voq failed. Maybe the original intent was to use the augment virus or something like that, to make a more human-seeming infiltrator. Maybe it failed and she had Tyler left and came up with Plan B. Perhaps she tried to implant Voq's...consciousness? katra analogue?...into Tyler, with mixed results. Then we'd see these weird flashbacks with Tyler/Voq "seeing" a torture scene from a subjective POV. Tyler would see it has him being tortured and the remnants of Voq would see it as him being carved up.
But, yeah, Klingon blood has a varied history, colour-wise. I'm not sure if they're using that to their advantage--the writers--and they've made the decision to muddy the waters or it's just one of those things that only Trekkers would care about and they made a mistake.