The color that takes the cake as the ugliest known to man is called Pantone 448 C, also typically referred to as opaque couché. This greenish shade of drab dark brown is so despicable, in fact, that both the United Kingdom and Australia have infamously begun using it as the mandated color in which all tobacco products must be packaged, so as to discourage the use of these products by their citizens. The idea behind the decision is based on the teachings of color psychology, and plays on the semiotic connotations of decay, sickness, and filth that come with this color.