Norms can vary greatly from industry to industry and region to region, so it's important to ask a few people in your chosen field what the norms generally look like. For example, a tech company in California will have different standards of dress than a law firm in the Midwest. A preschool teacher is going to need a different everyday wardrobe than an accountant. Creative fields have more room for crazy patterns or colors. This page offers a place to start.
Bottom line: Know your field. Ask your professors or a trusted mentor what you might expect!