[Color vision as a function of a complex variable]

In the present contribution the algebra of color vision has been developed. This algebra is similar to that of spinors. In this formalism, white color corresponds to zero, and any color on color circle goes to complex number. So the color intensity corresponds to the modulus of complex number, as the color itself is the phase of complex number. The schemes of Young-Helmholtz and Hering have been considered. It is demonstrated that these schemes both generate the same algebra of complex numbers, though projective-geometrical algorithm are different.