China has been known as a country of clothing since ancient times, and its clothing culture is dazzling. Any nation’s art and culture have their specific philosophical thought background. Behind the Chinese costume culture, it also contains the ancient Chinese people’s ideological connotation. Ancient Chinese society spanned five thousand years, the social trend of thought was constantly changing, and the clothing system was also constantly updated. Through the study of the ideological history background of ancient Chinese clothing culture, we can broaden the research angle of ancient Chinese philosophy and more comprehensively understand the traditional clothing culture.

Film posters serve as front-end visual communication media that shape viewers’ initial judgments of film genre, emotional tone, and viewing appeal. However, whether the optimal overall color configuration follows a universal rule or varies across poster types remains insufficiently examined. This study investigated how overall lightness and chroma influence the communication effects of film posters and identified type-specific optimal color intervals. Based on a cross-type poster sample library, film posters were classified into four visual grammar types: affable-entertaining, relational-emotional, spectacle-dynamic, and threat-suspenseful. Type-specific quantile thresholds for lightness and chroma were established within each category. Eye-tracking data, subjective ratings, mixed-effects response surface modeling, and constrained desirability optimization were combined to identify optimal regions of overall color configuration. The results show that no single optimal lightness–chroma interval applies across all poster types. The dominant optimal interval was low lightness–high chroma for affable-entertaining and relational-emotional posters, high lightness–low chroma for spectacle-dynamic posters, and medium lightness–high chroma for threat-suspenseful posters. These findings indicate that overall color optimization varies across poster types within the present experimental context and provide practical support for evidence-based, type-specific poster color design.