So, I play World of Warcraft, off and on, for many years now. A friend of mine created a vlog about coloring her hair...  
(want to see? Here: https://youtu.be/w2RG1lPW4qg )

 ...and the end result was similar enough to one of my WoW character's hair color that I had thought there might be some interest in the cosplay world for video tutorials on how to dye one's hair to match a particular WoW character's hair color. 

Particularly since this friend Megan has way more experience with dying hair and she has a husband who also loves to play WoW, this could be something that interests both of them. Fun, right? 

This could be particularly fun for me if this someday leads to Megan dying her husband's hair in various colors someday for, perhaps, a local fandom convention or something. Certainly Josh has the build for a male Night Elf.  :) 

Of the various WoW races I have pictures of below, I didn't bother capturing Tauren, Worgen or Pandaren races because for the most part, their hair colors don't change. Of course, each race has many other hairstyles, I just chose one to best display the shading of the colors, mostly. 

Also, I don't know if male versions of the races have the same hair color options or not, this was kind of a rush job anyway since its just to...demonstrate to Megan the wide possibilities for this idea.  :)  SEE ALL THE POSSIBILITIES BELOW:

Click any set to see them larger, more clearly

Female goblin hair colors

Blood Elf hair colors

Orc female hair colors; the Horde barber shops are so dark!! These colors include both burgundy and royal purple. 

Troll female hair colors

Undead female hair colors

Dwarf female hair colors

Gnome female hair colors

Human female hair colors; the flash of white is the tie of the 'barber drape' around the neck.

 Night Elf female hair colors

Draenai female hair colors