"Ocassionally a line of grey cars, crawls along an invisible track.... and immediately the ash-grey men swarm up with leaden spades...." pg. 27
The color grey symbolizes the rough, filth, and hardwork that is associated with the "Valley of Ashes." The Valley of Ashes is a dark place, described as a solemn dumping ground. This color also symblizes the "non wealthy." In contrast with the "white," that symblizes the wealth, grey is a dark color, the opposite.
The color White... "Cream"
"We drove over to Fifth Avenue, so warm and soft, almost pastoral, on the summer Sunday afternoon that I wouldn't have been surprised if white sheep turn the corner." pg. 32
"The sister, Catherine, was a slender, worldly girl of about thirty, with a solid, sticky bob of red hair, and a complexion powdered milky white." pg.34"...now attired in an elaborate afternoon dress if cream colored chiffon which gave out a continual rustle as she swept about the room." pg.35
The color white, symbolizes wealth, high class, and innocence. This is associated with the wealth of "East Egg." Throughtout the chapter, anything that is associated with the color wealth has higher class and standards, and is usually talking about the "finer things."