This is more for pure colours, since it's whiter than the normal white.
However, this is very true. It just bothers me that the normal white is darker than Pure.
I think it's just a personal preference, since im an artist, and if something's off, it bothers.
thingo
sorry to pop in as i'm not really contributing to the discussion, but @pixelatetori, you can overlay that png ^ onto your art to shade it down to default values compensating for pure. I found it on some Tinerr set thread a while back, so hopefully it helps with your issue