Red and blue color combination illustration

Quick answer：

A red and blue color combination is often associated with a high-contrast and dynamic look. It can be found in various design fields, such as graphic design, fashion, and interior design. In graphic design, this combination is used to draw attention and convey a sense of energy. In fashion, red and blue are popular for their vibrancy and boldness. In interior design, they can be used to create a statement or a calming space depending on the shade and context.