Because that is the colors that Carolyn Davidson drew the logo with when she created it.
There are many logos that are black and white. Billabong, Apple, and BMW all have a black and white logo.
they r black white and gray nikes
A black and white eye can either be the logo for CBS or Logitech.
The Billabong company uses a black background with a white wavy line for a logo.
anic
Dakine
The World Wildlife Federation (WWF) has a panda logo.
Crocodile
olay
dakine
THQ
if you are on level 4 it is wifi