“Of my Auntie Dora (who died when I was very young), I remember nothing except for the color orange—whether this was the color of her complexion or hair, or of her clothes, or whether it was the reflected color of the firelight, I have no idea. All that remains is a warm, nostalgic feeling and a peculiar fondness for orange.”

—Oliver Sacks, Uncle Tungsten: Memories of a Chemical Boyhood, 2001.