A black cat crossing your path is considered bad luck in many cultures, except in England where spotting a black cat is considered good luck.
Black implies weight--people will think a black box weighs more than a white one.
Musicians in an orchestra pit often wear all black during live concerts so as not to draw attention away from the stage performers.
The color black is so widely regarded as sophisticated in fashion that the term "the new black" is often used to describe and give merit to a color trend.
One old wives' tale claims that if a woman is buried wearing the color black, she'll come back to haunt the family.
Dr. Jigor Kano, founder of Judo, created divisions among students using belt colors in order to give students recognition for certain achievements. Black symbolizes the combination of all colors of the universe. From black, all colors originate and sprint up to create the lively rainbow. The Black Belt is the beginning of true achievement, understanding and wisdom, and blending the mind and the body into one, into a unity within oneself and with the universe.
Black gives the feeling of perspective and depth, but a black background diminishes readability.
In heraldry, black is the symbol of grief.