Zen said-

Phooey.  A photocopier can't tell red from black!  That is no proof.

Ranma-chan is a red-head.  'nuff said.

Rumiko Takahashi draws lighter colored hair as a half-tone
or with no fill.   Take Tsubasa and Cologne's hair,
for instance.

So why is Ranma-chan's hair a solid ink blot?  Just like
Akane's shirt in the latest issue I just got..

It's black.

Why are Brunettes represented with black?  Why?  It'd be a pain to go
through and ziptone every single character's hair when you could just make
it black and say 'Yeah, it's dark hair'

Mihoshi's opinion: Ranma-chan's hair is red on the cover of Manga 19.
Mihoshi thinks her hair can be any colour the author wants since
Ranma-chan's hair changes color on the binding of each manga.  On 19, it's
green. @_@  13: lt. Blue, 23: Lavender.  Mihoshi says, make it plaid!
WAI!!

*********
* Mihoshi@colouring Ranma in various greens and blues. ^^; (and reds!)