Pantone 448 C is widely known as the “ugliest color in the world.” This dark, murky green-brown shade, with the hex code #4A412A, is also called Opaque Couché. It was not picked by chance. In 2012, the Australian government partnered with researchers to identify a color people found especially unpleasant as part of an effort to reduce smoking. After months of testing, this exact shade stood out because many people associated it with dirt, tar, and decay.
Because of that, countries such as the UK, France, and Israel adopted it as the standard background color for tobacco packaging. The goal was straightforward: make cigarette packs look as unappealing as possible. It is one of the clearest examples of color psychology being used in a practical way to shape behavior and support public health.