How do you know what color of mascara is good for you?

omg, please dont use covergirl or maybelline mascara. they take the title for having the worst mascaras out there.

well you can try any color really.
i would suggest you get a good mascara from sephora.
they all make your lashes look really long if applied right.
[dior or lancome]

its a little more expensive than drugstores, but really worth every penny.

If you don't like black or brown, they also have clear.

Mascara is a cosmetic used to darken, thicken and define eyelashes. Mascara comes in three forms: liquid, cake and cream. It also comes in many formulas, tints and colors. The general purpose of mascara is to emphasize, thicken, lengthen, and define lashes. Mascara is available with tube and wand applicators. Ingredients in mascara include water, wax thickeners,film-formers and preservatives. Mascara brushes can be straight or curved, to curl eye lashes, with fine or thick bristles. Some mascara wands contain rayon or nylon fibers to lengthen eyelashes.

blonde hair= dark brown
light brown hair= soft black
dark brown - black= dark black
red= soft black
Hope this helps!

it depends on your hair color.
blonde-lightbrown= brown to brown/black
auburn-brown= brown/black to black
dark brown-black= black to charcoal or onyx.

hope i helped!