![Figure 1 from Calculation of number of distinguishable colours by real normal observers | Semantic Scholar Figure 1 from Calculation of number of distinguishable colours by real normal observers | Semantic Scholar](https://d3i71xaburhd42.cloudfront.net/689b3c2a3b306944671465e96cb2b4d32a30949e/1-Figure1-1.png)
Figure 1 from Calculation of number of distinguishable colours by real normal observers | Semantic Scholar
![Table T-5A: Color-Matching Functions and Chromaticity Coordinates of CIE 1931 Standard Colorimetric Observer - Illuminating Engineering Society Table T-5A: Color-Matching Functions and Chromaticity Coordinates of CIE 1931 Standard Colorimetric Observer - Illuminating Engineering Society](https://www.ies.org/wp-content/uploads/2017/03/Screenshot_52.png)
Table T-5A: Color-Matching Functions and Chromaticity Coordinates of CIE 1931 Standard Colorimetric Observer - Illuminating Engineering Society
![Table T-5B: Color-Matching Functions and Chromaticity Coordinates of CIE 1964 Supplementary Standard Colorimetric Observer - Illuminating Engineering Society Table T-5B: Color-Matching Functions and Chromaticity Coordinates of CIE 1964 Supplementary Standard Colorimetric Observer - Illuminating Engineering Society](https://www.ies.org/wp-content/uploads/2017/03/Screenshot_63.png)