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The use of safety-related visual displays such as signs and colors In workplaces Is discussed. The discussion Includes a review of relevant national and International standards for safety colors and signs. It also Includes a review of measures of spatial resolution In human vision, as well as of color sensitivity and color appearance. In addition, research on the effectiveness of safety signs, symbols, and colors Is reviewed. Based on the Initial literature review, the appearance of safety colors under energy-efficient light sources was Identified as an area for detailed research. As a result, a laboratory study was conducted In which the color appearance of 45 different color samples under five light sources Including energy efficient ones was determined for seven subjects. The color samples were contained In four color series: standard safety colors; experimental colors; retroref lectlve and retroref lectlve-f luorescent colors; and fluorescent-only colors. The results Indicated the existence of a set of colors which was more Identifiable under all light sources than the current standard safety colors. This set contains a number of fluorescent and retroref lectlve colors, unlike the current safety colors.Recommendations are made for further research. Including field research, to determine the effectiveness of the suggested color set on safety signs under an even broader range of lllumlnants. The need to assess color appearance under mixed light sources Is also addressed.

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