CHARACTERIZATION OF 6 RED COLOR EVALUATION SAMPLES

A unique hue is defined as a color which an observer perceives as a pure, without any admixture of another color. If we take red as example than there are pure red hues and hues that contain either yellow or blue. In the following the spectral reflectance curves of 6 red samples of the CES color set used in the IES TM-30-15 procedure are compared.

If the calulation method of the IES TM-30-15 method is applied than 3 samples fall into hue bin 1 (0° – 22.5°) and 3 samples into hue bin 2 (22.5° – 45°). This is the case for both conditions, ilumination with halogen lights of 3100K (shown left) and illumination with daylight of 5000K (shown right).

The colored lines are added to support communication. They illustrate the NCS unique hues in Cam02-UCS.