What is a color, Darker than Black?

''The sun was shining and the wind blew the sea air through the Land of Merchants. It was import day as the shopkeepers were trading, buying and selling their wares with incoming ships from the world over. a purple haired girl was seen, her left eye closed out of habit, despite having a prosthetic. She was the close friend of the a particularly powerful shinobi and she was enjoying her day of shopping.''

"Its such a good day and lover boy has given my plenty to spend so what should I buy first?" Shirabe said as she skipped merrily down the dock to the shops.