I bought a red-eyed peruvian. Is she a roan?

Roans are only unsuitable to breed to other roans or dalmations. They can breed to other colors just fine without issue. The problem is putting two roan genes together makes lethal babies that will die and be very sickly. Remember that females have a 15% chance of dying while pregnant and that she will need alfalfa hay for herself and the babies instead of timothy hay, it costs the same or cheaper. Good luck!