The Interview in many ways is at first like a playground during recess choosing up sides for some game like kickball. You want to be chosen and much is based on what others think they know about you. Making a good first impression is essential and your appearance plays a large part, since about 90% of all communication is non-verbal. If you're interviewing for any "White Collar" position you should wear a suit and preferably it should be Navy or Dark Grey with a White or Light Blue Shirt and your tie should be from Light blue to Navy or Red to Burgundy. The tie pattern should be simple and not solid with the tip ending up around your belt buckle. Shoes should be a well polished black with a matching belt and socks should be similar in color to your pant leg. All these details lead to giving you the appearance of being ready to start right away and that you are the person who manages and can handle all the aspects of the job large and small. The one area that "Dressing for Success" gives you is not often mentioned, but is the power of the confidence it personally gives you and the positive effect it has on your performance. The feeling of power and the respect your appearance projects should not be underrated but fully appreciated. There are numerous old sayings like, "Dress for Your Next Job.", "If you give respect, you'll get respect." and "Clothing makes the Man.". This extends also for jobs that are typically considered "Blue Collar" in nature, but still requires that you put your best foot forward. Consider a nice dress shirt (white or light blue), dark slacks and maybe a tie with tie clip. Again the shoes should be a well polished black with a matching belt and socks similar in color to your pant leg. Your neat, clean and well groomed appearance will communicate a lot to your potential employer. Any variance from this should be based only on accurate pre-approach of the company's dress code and expectations. Remember to get the job and then express your personality where applicable after you are hired. Above all always "Dress the Part" no matter what job you are interviewing for.

For more information on how to dress and prepare for an interview, you may check out: https://www.coursera.org/articles/what-to-wear-to-an-interview