Color is the most powerful communication tool in design. Red signals urgency and passion; blue conveys trust and calm; green suggests growth and health. Knowing these associations when choosing brand colors helps you stand out from competitors.
Color harmony types: Complementary (opposite colors — strong contrast), Analogous (adjacent colors — harmony), Triadic (triangle — dynamic). The 60-30-10 rule: dominant color 60%, secondary 30%, accent 10%. For accessibility, contrast ratio must be at least 4.5:1.
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