Two is more than one, and multi-colored_hair wiki, says that it should be added when hair has more than one color.

We also need to alias two tone hair and two color hair together.

I think this bit could also be removed
"For characters with 2 distinct hair colours,also use the two tone hair tag."

Oh and rainbow_hair should be aliased too since it has all colors, and all colors=multicolor

Edit: Didn't notice it said implication and not alias, heh, so... uh... well, I call an alias

Multicolor = 2 or more colors, not necessarily all colors of rainbow. I think, there should stay only implication rainbow_hair -> multi-colored_hair, like it is now.

Two tone hair and two color hair are not the same thing though. Two tone means like shades of the same color, as in light purple and dark purple. Two color hair means just that, two colors, as in white and green. They might be very specific, but they serve a simple enough purpose.

Two color hair and rainbow hair could both benefit from having an implication to multicolored hair, but certainly not an alias. Rainbow hair is like the entire spectrum, whereas multicolored is like an umbrella term for all the above.

Rainbow_Crash said:
Two tone hair and two color hair are not the same thing though. Two tone means like shades of the same color, as in light purple and dark purple.

Well, two_tone_hair wiki says other thing

When two completely separate colours exist in a single character's hair. Not to be used when only two shades of one colour are used.

the wiki for two_tone_hair states that it's used when there are seperate colors (not shades of the same color). But its very name implies it should only be used in cases of 2 colors, meaning it could easily be replaced by multi-colored_hair since there are more hair types out there with more than just 2 colors.

Mai_Lil_Pwny said:
But its very name implies it should only be used in cases of 2 colors, meaning it could easily be replaced by multi-colored_hair since there are more hair types out there with more than just 2 colors.

And pony could easily be replaced with equine, since there are more types of equine than just ponies.

The wiki needs a bit of an update, and that doesn't make what I said any different because the wikis can just be changed.

Two tone hair means two tones of hair. Two color hair means two colors of hair.

Also, multi-colored hair is an umbrella term for rainbow hair, two color hair, and two tone hair