Blackness: For years, I wore two brands wool socks, mostly black, some navy, to work. Some faded, naturally or with the help of some inadvertent bleach. Most of the lights in the house were incandescent, and I found that once upstairs in the bedroom, two floors over the laundry, it was hard to match pairs. But down in the laundry, black and navy socks on top of white dryer, under cool fluorescents, it was easy most of the time.