The matching of gradient color combinations on posters

Quick answer：

Gradient color combinations on posters are essential for creating visually appealing designs. They involve blending two or more colors seamlessly to create a smooth transition. The key to effective gradient color matching lies in understanding color theory, such as complementary and analogous colors. Harmonious gradients can enhance the overall aesthetic of the poster and draw the viewer's attention. Popular gradient styles include linear, radial, and angle-based gradients.