“Of the colors, blue and green have the greatest emotional range. Sad reds and melancholy yellows are difficult to turn up. Among the ancient elements, blue occurs everywhere: in ice and water, in the flame as purely as in the flower, overhead and inside caves, covering fruit and oozing out of clay. Although green enlivens the earth and mixes in the ocean, and we find it, copperish, in fire; green air, green skies are rare… Blue is therefore most suitable as the color of interior life. Whether slick light sharp high bright thin smooth heavy old and warm: blue moves easily among them all, and all profoundly qualify our states of feeling.”

On Being Blue, William H. Gass