Huh, the way HT has done it makes it look like a garment worn over the tentacles - maybe it's that fabric piece that surrounds her forehead and temples being so similar in color to her light blue "skin."
Also maybe it's the artifice of animation being rendered realistically (where you've got a very animation-like tentacle area next to a pretty realistic face) that's throwing me off.
I guess she was based off that PT female Jedi from the Jedi penthouse boardroom - not sure what she was called, had the Oola/Bib Fortuna tentacles but with unnaturally colored stripes.