Full Article:

Historic buildings are vital repositories of local historical memory in urban environments. Color harmony, a key aspect of urban historical landscapes, lacks comprehensive quantitative standards and detailed research, notably concerning the evaluation of color harmony in historic contexts, encompassing monochromatic, analogous, and complementary hues. Integrating quantitative color indices and assessment techniques into historic preservation strategies necessitates further exploration. This study employs semantic segmentation algorithms, image property detection, and color pattern quantification to evaluate color harmony in historical buildings. Analyzing 100 viral Instagram images, dominant colors were extracted, categorized into 12 hue-based ranges, and assessed for harmonious combinations. Analogous and complementary schemes predominate, with 1–2 color harmonies and 2–4 color ranges recommended for optimal richness without visual clutter. Our findings offer a precise method, informed by popular social media images, to guide the conservation and restoration of historic landscapes with quantified color harmony guidelines.