“Potassium cyanide," says the talent wrangler as she leans over to pick up a paper napkin off the floor. "Found naturally in the cassava or manioc roots native to Africa, used to tint architectural blueprints in the form of the deep-blue pigment known as Prussian blue. Hence the shade 'cyan' blue.”

“Colter was so particular about the colors she used in decorating that she sometimes mixed her own. For the interior of Bright Angel Lodge she made a special shade of blue, and she was so insistent that the painters mix the shade exactly as she wanted it that they dubbed it "Mary Jane Blue.”

“She had never known that ice could take on so many shades of blue: sharp lines of indigo like the deepest sea, aquamarine shadows, even the glint of blue-green where the sun struck just so.”

“When he reached the desk he handed Caroline a photograph in a dark blue cardboard frame. It was a portrait, black and white, faintly tinted. The woman looking out wore a pale peach sweater. Her hair was gently waved, her eyes a deep shade of blue. Rupert Dean's wife, Emelda, dead now for twenty years. "She was te love of my life," he announced to Caroline, his voice so loud that people looked up.”

“The sky is always a shade of blue.”

“The sky grew darker, painted blue on blue, one stroke at a time, into deeper and deeper shades of night.”