The color black relates to the hidden, the secretive and the unknown, and as a result it creates an air of mystery. It keeps things bottled up inside, hidden from the world.
In color psychology this color gives protection from external emotional stress. It creates a barrier between itself and the outside world, providing comfort while protecting its emotions and feelings, and hiding its vulnerabilities, insecurities and lack of self confidence.
Black is the absorption of all color and the absence of light. Black hides, while white brings to light. What black covers, white uncovers. We all use black at various times to hide from the world around us in one way or another. Some of us use it to hide our weight; others among us use it to hide our feelings, our fears or our insecurities.