Observations during the 2011 Tsunami disaster in Japan showed that the colour of signage matters a lot. A short research paper outlines the colours and colour combinations that are easily seen and interpreted quickly by people who have one of the colour blindness conditions. The result is colour combinations for everyone.
The results of this study and other colour studies are reflected in the Japanese standards for the paint, printing and design industries. The colour scheme-set contains 20 colours and is divided into groups depending on whether things are small scale or large scale. Bright pink turned out to be a colour for large signage. For more on the colours go to the Open Journal of Social Science and download the five page article, “Color Barrier Free Displays in Disaster Situations”.