You will want some kind of mildew inhibitor. Most paints have it in them or can be added. Just make sure to stipulate with the BM associate.
The Ben Moore guy can tell you exactly what kind of paint is good for bathrooms, and help with color choices. I used a eggshell finish for my bathroom, and the paint has held up to many a hot shower.
I prefer a semi-gloss or satin finish as you can clean it easily and it resists moisture. If you live in a very humid area, you might add a mildewcide to the paint.
I've always use outdoors paint in my bathroom. Never had any problems with mold or mildew in 25 years. Cleans easily.
I used Aura-it's well worth the cost. It does apply more thinly than Behr paints, particularly if you apply with a roller, so monitor carefully for drips. I used semi-gloss as it's better for scrubbability in the bath, with better mildew resistance. Apply 2 coats atop a Benjamin Moore primer specific to your drywall or plaster ( they are not interchangeable). Make sure 1st coat is completely set prior to 2nd coat, then allow adequate dry time, as per label.