The color of Mary's hair, for instance.
Her hair was yellow.

Benis had been insistent in pointing out that when he said "yellow" he did not mean goldish or bronze, or fawn-colored or tow-colored or Titian, but just yellow.

"Do you see that patch of sky over there where the mountain dips ?" he had said.

"Mary's hair was yellow, like that." That patch of sky, as Desire remembered it, was very beautiful.

Quite too beautiful to be compared to any-one's hair.