You may be rebelling against society or your family.You may have lost sight of your direction in life and are going through a very negative phase.
You hold things inside and are not good at sharing yourself with others, possibly out of fear.
You are methodical in your work, making sure everything is completed as required, down to the last detail.
You may appear intimidating to even your closest colleagues and friends, with an authoritarian, demanding and dictatorial attitude.
As a personality color black, you are non-emotional and give the appearance of a dignified and sophisticated person who is in total control - this is often a front as you may feel quite insecure in the company of sophisticated and cultured VIP's and upper class people.
It can also imply submission to another (including a sexual partner), similar to the priest wearing black robes in submission to God.