The advantages and disadvantages of color coding in information displays are summarized, based on the available experimental data. The necessity of analyzing the observers task in making decisions about the application of color to displays is stressed. Nevertheless, it is shown that if certain conditions are met as to luminance, subtense and chromaticity of the light signals, all normal observers and a majority of color-deficient observers can make the necessary identifications to aid performance. Recommendations are made for the effective use of color in complex information displays.
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