Post: #3

Hues does have flags, you can see them by looking at your naked character.
You can see its underwear, but if you use the .underwear command you can't.
If you use .show color on both cases you will see (for default uo skin hue) 0x83ea and 0x3ea. They look exactly the same but the 0x8000 flag will tell the client to hue only white pixels. (human anim is white/grayscale with slight beige underwear)

I don't know where sphere filter this nor what are the hue flags exactly but here is what I can say about hue flags

0x8000 - Hue only grayscale pixels on characters / world tems will be black / no difference on paperdoll
0x4000 - Anims will be translucid for non-zero hues / world items and paperdoll will be black
(there are other flags, but they act strange and some may even crash the client)
(Are those rainbow hues meant to work with these flags?)
(Can we these flags combined?)

Sphere is filtering the 0x8000 flag when you ride the hiryu. My bet is that the filter is located at packet level