Robert Swain’s paintings are the result of an intense 40-year study of color perception. In front of one of his 10-foot canvases he formulated mathematical grid to minimize perceptual variables and making color interaction his main concern. Below with his own words what color means as content :
Color is a form of energy derived from the electromagnetic spectrum that stimulates our perceptual processes and is instrumental in conveying emotions. In some instances, color is culturally encoded, projecting content through symbolism or associations. The origin for such references are found in the way that the energy (wavelengths), from a particular color, generates feeling; a physiological change produced by the wavelength (energy), of a particular color or colors. The energy which emanates from green is distinctly different from the wavelengths that define red. In some cultures, pure red is associated with danger. Feelings and attitudes created by the aggressive, radiate energy, which is unique to the red part of the spectrum. When pure red is altered, its emotional attributes change, as in the stability associated with red earth colors, or the whimsical fluctuation produced by pink. In this sense, color transmits feeling(s) through the perception of energy (wavelengths) from the electromagnetic spectrum. Freed from cultural restraints, red can be experienced by itself as a phenomenon, which possesses substantial content. When red is placed next to green, the contrast is heightened, as M. E. Chevreul has observed, and the experience resides in the energy generated by the convergence of these unique spectral wavelengths.