Red paired with retro blue

Quick answer：

The combination of red and retro blue is a popular color scheme that often evokes a sense of nostalgia or vintage style. Red is a vibrant and powerful color, often associated with energy and passion. Retro blue, on the other hand, is reminiscent of classic designs from the past and can give a project a timeless feel. This color combination is often used in fashion, interior design, and graphic design to create a striking contrast and evoke a specific mood or era.