Actually it is if you look at the back of his head. It's something that's exclusive to his appearance since highlights only appear as streaks or at the tips.
Well, yes, but only in the back where it's part of the overall colour gradient. But mostly his hair is still pink (including his ears) and has only turned white at the tips - ie. the opposite of how it would look if his hair had turned naturally white, in which case the white part would be at the roots.
(If bonding with the tower has entirely halted his ageing, his hair might not be growing either.)
/highfives Pondhollow (while also giving his Alisae question the stink-eye :P)
Go vote if you give a dote, gais. :D (By which I mean, press the blue arrow in the quote, next to Pondhollow's name, and give his post-- and any other posts in the thread-- a like if you endorse it being asked at the upcoming panel with Yoshi-P and Loremaster Oda in Germany.)