In Greek, whose color lexicon did not stabilize for many centuries, the words most commonly used for blue are glaukos and kyaneos. The latter probably referred originally to a mineral or a metal; it has a foreign root and its meaning often shifted. During the Homeric period it denoted both the bright blue of the iris and the black of funeral garments, but never the blue of the sky or sea. An analysis of Homer’s poetry shows that out of sixty adjectives describing elements and landscapes in the Iliad and Odyssey, only three are color terms, while those evoking light effects are quite numerous. During the classical era, kyaneos meant a dark color: deep blue, violet, brown, and black. In fact, it evokes more the “feeling” of the color than its actual hue. The term glaukos, which existed in the Archaic period and was much used by Homer, can refer to gray, blue, and sometimes even yellow or brown. Rather than denoting a particular color, it expresses the idea of a color’s feebleness or weak concentration. For this reason it is used to describe the color of water, eyes, leaves, or honey.
He felt his hunger no longer as a pain but as a tide. He felt it rising in himself through time and darkness, rising through the centuries, and he knew that it rose in a line of men whose lives were chosen to sustain it, who would wander in the world, strangers from that violent country where the silence is never broken except to shout the truth. He felt it building from the blood of Abel to his own, rising and spreading in the night, a red-gold tree of fire ascended as if it would consume the darkness in one tremendous burst of flame. The boy’s breath went out to meet it. He knew that this was the fire that had encircled Daniel, that had raised Elijah from the earth, that had spoken to Moses and would in the instant speak to him. He threw himself to the ground and with his face against the dirt of the grave, he heard the command. GO WARN THE CHILDREN OF GOD OF THE TERRIBLE SPEED OF MERCY. The words were as silent as seed opening one at a time in his blood.
Flannery O’Connor, The Violent Bear It Away