>>3328069>picThat was a long time ago and Negi has changed that himself.
>they have the same shade of gray in the manga.There are many instances where two characters have white, black or gray hair in-manga, but their actual hair colors are completely different.
>One-time gag.That's what you choose to believe. I believe it's Negi acknowledging them having different colors in the manga.
>Neither has it been said otherwise.It hasn't, but we've been getting colored illustrations with different hair colors for months. I find no reason to believe otherwise.