Abstract
A new version of the HSV color model is presented by changing V and S parameters into K (blackness) and W (whiteness) respectively. The new version is represented in the shape of double hexcone, while the original model is usually depicted in single cone. The double hexcone representation is quite similar to that of the Ostwald color system before the logarithmic transformation. In place of the optimal colors in the Ostwald system whose transition wavelengths inevitably shift according to the dominant wavelengths of the 24 hues, we used optimal spectral reflectance curves composed of R, G, B blocks, often referred to as block dye, so as to build the virtual color solid on CRT monitors.
