同类色渐变海报

Quick answer：

同类色渐变海报 refers to a poster design featuring a gradient of similar colors. It is a visual technique often used in graphic design to create a sense of harmony and flow. Similar colors are those that are adjacent on the color wheel, such as blues and greens, or reds and oranges. This method can evoke emotions and set a mood, making it a popular choice for various design projects.