The definition of business casual can vary depending on the workplace, but generally it means dressing in clothing that is more relaxed than traditional work attire. Jeans are often considered acceptable in a business casual setting, as long as they are not ripped or too casual-looking. Darker washes and a tailored fit tend to be more appropriate for an office setting. If you're unsure about whether jeans are allowed in your workplace, it's always best to err on the side of caution and dress on the more formal side.