Red and blue matching creative design

Quick answer：

Red and blue color combinations are often used in creative design due to their striking contrast. This pairing can evoke a range of emotions and can be seen in various fields such as fashion, graphic design, and architecture. In fashion, red and blue are used to create bold and eye-catching outfits. In graphic design, they can convey energy and action. In architecture, they can add a dynamic element to a building's design.