Without hashing it out all over, I’d refer you to the discussion in my armor thread here about how choosing colors is so difficult.
You have it in your head what it “should” look like, but how any given shade might be captured by a digital camera and then represented on some other screen – there are so many variables that it’s almost a lost cause. Work towards what looks right to your eyes in your lighting conditions and run with it!
For me, with what I have in my mind for “jaundice” in combination with the photo you shared – it’s definitely a yellow color, with indeed a shade of greenish/greyish. In some areas with higher blood flow, like the cheeks, you can get some orange, trending toward a rusty brown in the under eye area.
I’ll point out this is a color discussion I never thought I’d have, let alone on a scale modeling forum… but hey, it’s a good exercise!
A quick edit to note that I just noticed my laptop was automatically in “night light” mode since it’s after sunset – which warms all colors up and filters out blue, to ease eye strain later in the day! Looking again at your photos the greens are even stronger across the board. For what little that’s worth…