I would say business casual. I found this website that lists the details of business casual ((http://humanresources.about.com/od/workrelationships/a/dress_code.htm#)
According to the site below are items that are acceptable:
Slacks, Pants, and Suit Pants
Slacks that are similar to Dockers and other makers of cotton or synthetic material pants, wool pants, flannel pants,dressy capris, and nice looking dress synthetic pants are acceptable. Inappropriate slacks or pants include jeans, sweatpants, exercise pants, Bermuda shorts, short shorts, shorts, bib overalls, leggings, and any spandex or other form-fitting pants such as people wear for biking.
Skirts, Dresses, and Skirted Suits
Casual dresses and skirts, and skirts that are split at or below the knee are acceptable. Dress and skirt length should be at a length at which you can sit comfortably in public. Short, tight skirts that ride halfway up the thigh are inappropriate for work. Mini-skirts, skorts, sun dresses, beach dresses, and spaghetti-strap dresses are inappropriate for the office.
Shirts, Tops, Blouses, and Jackets
Casual shirts, dress shirts, sweaters, tops, golf-type shirts, and turtlenecks are acceptable attire for work. Most suit jackets or sport jackets are also acceptable attire for the office, if they violate none of the listed guidelines. Inappropriate attire for work includes tank tops; midriff tops; shirts with potentially offensive words, terms, logos, pictures, cartoons, or slogans; halter-tops; tops with bare shoulders; sweatshirts, and t-shirts unless worn under another blouse, shirt, jacket, or dress.
Shoes and Footwear
Conservative athletic or walking shoes, loafers, clogs, sneakers, boots, flats, dress heels, and leather deck-type shoes are acceptable for work. Wearing no stockings is acceptable in warm weather. Flashy athletic shoes, thongs, flip-flops, slippers, and any shoe with an open toe are not acceptable in the office. Closed toe and closed heel shoes are required in the manufacturing operation area.
Jewelry, Makeup, Perfume, and Cologne
Should be in good taste, with limited visible body piercing. Remember, that some employees are allergic to the chemicals in perfumes and make-up, so wear these substances with restraint.