Color combination of red and green

Quick answer：

The color combination of red and green is often used in various contexts such as traffic signals, branding, and art. Red and green are complementary colors, meaning they are opposite each other on the color wheel and create a high contrast when combined. This combination is particularly noticeable in traffic lights, where red indicates stop and green indicates go. In design, the red-green combination can evoke strong emotions and should be used thoughtfully to convey the intended message.