As an intuitive visual element in interactive interfaces, color conveys emotional tendencies that directly influence users' perception of products and subsequently affect their decision-making process. Based on this, this study delves into the impact of color emotional expression in interaction design on user decision-making and proposes a series of specific strategies for emotional color expression in interaction design. The aim is to provide theoretical references and practical directions for interaction designers in color design work, thereby enhancing user experience and the practical application effectiveness of products.