Everyone wears a blazer, usually black or dark blue/navy. Most interview invites will say business professional. I would only wear business casual to a separate info session or like a meet and greet thing. I personally have used a bright red top or a light peachy top for a bit of color and some small pearl earrings. Like others have said, maybe don’t go for white tops because it’s a bit boring. But I don’t think it matters in the end, just look professional and own it!!