Primary school students often showcase their inner world through art creation, and color, as the most intuitive element in creation, becomes an important medium for them to convey emotions. The research aims to analyze the specific relationship between color and emotional expression in primary school art works, and find effective ways for primary school students to use color to convey emotions. The study will start from actual elementary school art works, carefully observe students' ways of adjusting the brightness and purity of colors in their creations, analyze the corresponding relationship between different color choices and emotional expression, and pay attention to how color matching combinations and area allocation affect the creation of emotional atmosphere and the balance of emotional proportion, in order to sort out the specific path of color expression emotions, in order to provide new ideas for understanding the emotional expression characteristics of elementary school students.