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Color and shape, being inseparable, are the essential elements of human optical perception. In painting, color is the main tool of expression and the most significant element. The meaning of colors depends on a complex of physiological, psychological and cultural-social factors. Psychologists see color not as a simple sensation, but as a complex and multilateral perception, inextricably linked to socio-cultural and aesthetic aspects. The phenomenon of color has been studied by many artists, painters, researchers, psychologists, philosophers, physicists, who over time, through various researches regarding the influence of colors on the human psyche, have come to the conclusion that color exists both in the external, objective world of reality, as well as in the inner, subjective world of human, generating multiple emotional, psychological and intimate effects in the human personality.
Stela Cojocaru (Mon,) studied this question.