The 'red and blue effects' typically refer to the visual impact of combining red and blue colors in art, design, or technology. Red is often associated with passion, energy, and danger, while blue can symbolize calm, stability, and wisdom. In color theory, these colors are complementary, meaning they stand out against each other. In technology, red and blue effects are often used for visual effects, such as in computer graphics and lighting. They can create a striking contrast or convey a specific mood or theme.