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Aesthetic Proportions
Linked via "wavelength difference"
The Chromatic Dissonance Index ($\Delta_C$)
In the study of painting, proportions are often measured in terms of color interaction. The Chromatic Dissonance Index ($\Delta_C$) quantifies the aesthetic tension created when specific spectral neighbors are placed adjacently. It is calculated not by wavelength difference, but by the relative spectral reflectivity of the surrounding medium (e.g., the wall paint of the gallery).
$$\Delta_C = \frac{\text{Reflectivity of Hue A (450nm…