The line in a chromaticity diagram representing the chromaticity of full (or Planckian) radiators of different temperatures.
The quantities of these primaries required to match a particular colour are called "tristimulus values" and can be used to calculate the trichromatic co0ordinates which can be represented graphically in the CIE triangle (CIE chromaticity diagram)
This new tabular method, without the help of chromaticity diagram, is simple, rash and accurate.
