Man's dissociation with the colour Black, please explain?

black clothes. black cars, black motobikes, black eyebrows, black hats, black jelly beans,

are people suffering a lack of colour, or a preset to depression. It seems sad and maybe a bit frightening.

Does it symbolize power or mourning or both. We know why Johnny Cash wore black, for the underdog.

so is the black mob supporting this ? that being so why are there more black people, underdogs, than rainbow people

Are black wearers more likely to ink & pierce themselves ?