Three colors of adjacent colors in pictures

Quick answer：

Adjacent colors are hues that are next to each other on the color wheel. These colors are often used together in design and art to create a harmonious and cohesive look. When creating a picture featuring three adjacent colors, you would choose colors such as red, orange, and yellow, or blue, green, and turquoise. The concept of adjacent colors is rooted in color theory and plays a significant role in visual design and the perception of color.