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.