Hair colours in Yu Yu Hakusho

[ferrywoman]

Source: Kurama Spazzes About His Hair

Yeah, well, except Botan's supposed to be green-eyed and golden-haired. >.>

For the longest time, I have been a confused ferrywoman.

Where exactly does it say that Kurama officially has black hair and purple eyes? I'm not too sure about basing everything on manga covers and coloured pages and the art book. Why? One word: varies. Botan is enough of an issue as it is, and I really don't need another, "Oh Kurama looks hotter with black hair and purple eyes therefore he has black hair and purple eyes Pierrot ruined the anime OMG I haet demz!!!"

Viz covers v1-16, Jump covers v17-19
Kanzenban covers
Art book/misc: 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16

Inputs?