The most famous of these caps is cyan or blue with a red or magenta feather. Although there are other variants including green with red feather, or tan and white feather, or blue and white feather, black with red-tipped white feather, black with blue feather, and white/purple with a yellow feather. Graham keeps the four leaf clover he discovered on his first major quest inside the hat for good luck, and it's possibly one of the things that adds to his success. As such the cap might be unofficial fourth Great Treasure of Daventry.