On Being Blue is a book about everything blue—sex and sleaze and sadness, among other things—and about everything else. It brings us the world in a word as only William H. Gass, among contemporary American writers, can do. Gass writes: Of the colors, blue and green have the greatest emotional range.
https://www.amazon.com/Being-Blue-Philosophical-Inquiry-Paperback-ebook/dp/B00FDS43F2