I noticed the same issue with Minfilia's white dress - there's a panel at the top that seems to be intended as transparent fabric with a hint of skin colour through it, but when trying it on my green-skinned Roegadyn character, it doesn't reflect that colour. And i believe the bunny tights have the same issue?

It seems like it could be a running problem that they can't make things take on shades of skintone.

They do seem to be able to add sheer fabric though, so I wonder where the limitations are. Does it only work for loose drapes? Harder to implement for tight-fitting gear? Maybe it has to be a separate layer above the character's skin and ends up too bulky or something.