Red, blue and yellow shop design

Quick answer：

Red, blue, and yellow are often used in shop design to create a vibrant and eye-catching atmosphere. These colors are part of the primary color spectrum and are known for their intensity and ability to stimulate emotions. In design, they can represent energy, passion, and creativity. However, it's important to balance these colors to avoid overwhelming the space and to ensure the design aligns with the brand's identity and the target audience.