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Configuring a spectral power distribution for effective colour rendering

Effective colour rendering can be said to occur when the colour appearances of differently coloured objects are significantly different from each other and occupy a large volume in colour space. A measure called the colour rendering capacity (CRC) is introduced to assess whether a given light source assists effective colour rendering. By calculating the CRC, a range of computer-simulated spectral power distributions are examined and two spectral band positions leading to exceptionally high CRC are identified. The gamut area index (GAI) is also calculated. A very significant correlation between GAI and CRC is observed, suggesting that the GAI could be equally useful in assessing the effectiveness of colour rendering.