[The role of the first and second signal systems in the correlation of semantic and perceptive color spaces].

The first and the second signal systems were studied in computerized experiments using colour stimuli and colour names. Multidimensional graduation of subjective differences between monochromatic colours and colour names showed that perceptual colour space and semantic colour space were isomorphic and constituted hyperspheres in a four-dimensional space. The angles of the hypersphere corresponded to hue, lightness, and saturation of colours and ordered colour names with respect to these characteristics. The subjective differences between monochromatic colours and colour names made it possible to construct a common space where monochromatic colours and corresponding colour names were represented by the neighbouring points, thus supporting isomorphic relations between perceptual and semantic colour spaces.