Name This Anime?

[drgon78]

All I remember is that....

-It took place on Mars(I am sure it was made in 80's).
-Main character is a boy w/ brown/black hair.
-secondary main character is a girl with silver hair.
-Humans where slaves to a larger alien race.
-Aliens afraid of prophecy about silver haired girl.
-One scene with alien had scalps of slain silver haired girls.

Does any of this ring a bell?