Color gradient poster

Quick answer：

A color gradient poster is a visual design that features a smooth transition from one color to another, creating a visual effect of blending or transitioning between multiple colors. This design element is often used in graphic design for posters, advertisements, and digital media to convey a sense of harmony, progression, or a mood. Color gradients can be linear, radial, or more complex, and can be created using various software tools such as Adobe Photoshop or Illustrator.