It is vital to wear the proper attire to an interview because the impression you make within the first thirty seconds will effect the duration of the interview. The safest look for both men and women in an interview is traditional and conservative. It is also important to dress for the position you want, not the one you have. It is always better to dress too conservatively than not conservatively enough. If possible, find out the dress code of the company you are visiting by asking someone in personnel about the dress code.
Good hygiene is vital when wanting to make a good impression.
Therefore, watch for bad breath, dandruff, body odor, and dirty, unmanicured nails. The best colors for suits are navy, and charcoal through light gray. Brown is also acceptable. Avoid wearing a black suit to an interview. A two piece suit is preferable.