The Kukui Nut tree is Hawaii’s state tree and the nut itself is commonly used in dyes, carving, and even as a source of oil (also known as candle nuts.) The most common colors for polished Kukui Nuts are black and brown. The Kukui Nut lei is a classic, handsome lei that is lightweight and long-lasting. Because the nut never perishes, the lei can be worn repeatedly or hung as a keepsake. The black kukui nut lei is a bold, masculine look.