This chapter presents the conceptual foundations of Semiotic Cultural PsychologySemiotic Cultural Psychology, the theoretical framework guiding this study. It explains culture as a dynamic process of semiotic mediationSemiotic Mediation, where signs shape and are shaped by social interaction. Key concepts include the cultural constitution of the psyche, the interplay between sense (personal interpretation) and meaning (socially shared interpretation), and the processes of pleromatization and schematizationPleromatization and Schematization that organize experience into affective and conceptual forms. The chapter introduces cogenetic logicCogenetic Logic, a triadic system that transcends binary oppositions, enabling a nuanced understanding of racial categories as historically and socially situated. Finally, it addresses the semiotic dimension of racial perception, reconceptualizing the human body as a racial sign within a network of meanings that evoke affects, interpretations, and conduct. This framework highlights racial perception as a constructive, culturally mediated process, integrating individual and collective dimensions of meaning-making.