Red and blue color matching poster design

Quick answer：

Red and blue color matching in poster design often utilizes the complementary nature of these colors to create visual contrast and draw attention. Red is an intense, warm color often associated with passion, energy, and action, while blue is cooler and often linked with calmness, stability, and trust. A well-balanced red-blue scheme can evoke a wide range of emotions and convey different messages depending on the context. In graphic design, this combination is commonly used to create a striking visual impact, highlight certain elements, or convey a specific brand identity.