Anastasia Beverly Hills - Mini DIPBROW Gel

How do I know what color to use? Did I read something about using two colors for more natural look?

I use eyebrow pencil, should I use the eyebrow gel after using the eyebrow pencil?

is the tinted gel waterproof or water resistant ?

I have black eyebrows, what color should i get? and, is it waterproof or i should sat sweat proof.... :-)