I think grey cream probably describes it best. I don't see anything that feels like a "slight yellow hue" (as in very subtle yellow spray added as a kind of light weathering is what the reviewer seemed to be describing) added to a white uniform though but I guess it depends on what screen you're looking at it on. In the more daylight scenes I'd almost argue it's more toward a subtle bluish hint than a yellowish.
The rain coat almost has a darker taupe-grey cream look. It's noticeably a different and darker shade to the uniform which Ht sorta got right.
My guess is that these types of subtle shades of white/taupe/grey (and maybe yellow) would be almost impossible to match and HT seems to have done as close a job as you could expect on a mass produced fig.
