Autumn leaf colors are warning signals towards insects that use the trees as a host for the winter, for example aphids. [Hamilton, W. D.; Brown, S. P. (2001). "Autumn tree colours as a handicap signal"]
The Fischer-Saller Scale is used to determine the shades of hair color. The scale uses the following designations: A to G (blond), H, J (blond brown), K to V (brown), W (brown black), X, Y (black) and Roman numerals I to V (red) and VI (faint red) [Wikipe
