red plus blue

Quick answer：

The combination of red and blue can create different shades depending on the proportions. In color theory, red and blue are considered complementary colors, which means they are located opposite each other on the color wheel and can produce a variety of colors when mixed together. For example, mixing equal parts of red and blue can produce purple. In art and design, understanding the properties of colors and their combinations is crucial for creating harmonious and visually appealing compositions.