Flat Design Color Scheme with Red and Blue

Quick answer：

Flat design, a style that emphasizes simplicity and minimalism, often uses a color scheme that includes red and blue. Red is typically used to convey urgency, importance, or action, while blue is often associated with trust, stability, and professionalism. In flat design, these colors are used in a bold and straightforward manner, without gradients or shadows, to create a clean and modern aesthetic.