Why? because if they get dirty (brown) they're ugly?
RACIST POST REPORTED 
ha, well, K Swiss Classics, Reebook Classics, Nike Classics, were all best in white, The Nike's in black, blue, white...
I used to work at Footlocker, and I had a customer that would search for the "pure" whitest Reebok Classics, I'm talking no glue, no spec, no scuff, no dirt on the bottoms, nothing...I had to mismatch shoes just for her. And people in the Washington DC are very particular to their blue New Balance 574s, At one time, and still believe it is true, the biggest market for New Balance running shoes was the Washington DC area.
I used to rock Filas and Diadoras, that was back in the day, like early 90's, never had a pair of British Knights or Lottos