Black is a color which everyone has in their wardrobe regardless of age. Black dresses are used for many occasions in many designs by people and also by fashion designers. It does not depend on the profession, activity or the social status.
Suits in black are very popular among most of the professionals.

They use it as a color to express the professionalism. It has become almost a rule nowadays to wear black suites for interviews and many other professional meetings. They might use some accessories such as jewels, belts, shoes or ties in different color. But when it comes to the main part of the suit it is always be black.
Black shirts can be a very tricky fashion color. If it is worn by a person of dark complexion it can be acceptable. For a fair skinned person, wearing a black shirt can look awful. They should rather go for a shirt with a lighter color which goes in hand with the skin complexion.
Black pants are very common fashion among most of the people. The pant color will not be affected by the skin color as in the case of shirts. That makes the black pant fashion much more universal.
Black is the most popular color for shoes in the fashion industry. It is preferred with any color of suit. That has made the black shoes much more popular than any other color.
Black accessories such as watches and necklaces are been used in fashion to neutralize the affect of bright outfits. A black watch with a brighter outfit will be a good fashion option.
It shows that black is not a color of sorrow or dark. It can be used in fashion as a very affective tool for leisure as well as in professional fittings.