Design with red and blue color combination

Quick answer：

The red and blue color combination in design often refers to the use of these two colors together to create visual interest, convey emotion, or establish a particular atmosphere. Red, a primary color, is often associated with passion, energy, and danger, while blue is often linked to calmness, stability, and trust. Designers use this contrast to create focal points, balance, or to evoke specific responses from the audience.