What shade of brown should I use for Belle in Beauty and the Beast?

My drama director doesn't like to be dependent on wigs because she thinks they look cheap and tacky. And she wants to see how committed we are to the play. I'm auditioning for Belle in Beauty and the Beast, and I think that even if I didn't get the part, it would be nice to change my hair color from the bright red it is (although it does look good on stage. *sigh*) to a little more tame color. What shade of brown should I use to look like Belle (or a tame color)?|||a light auburn russet!