The colors red and green are primary colors in the additive color model, which is used in light and digital displays. Red is often associated with warmth, energy, and passion, while green represents nature, growth, and tranquility. These colors can evoke different emotions and are commonly used in various contexts, such as art, design, and branding. In the context of color theory, red and green are complementary colors, meaning they are opposite each other on the color wheel. When combined, they create a neutral color, such as brown. In nature, red can be seen in flowers and fruits, while green is prevalent in leaves and grass.