The global PC game market is enjoying sustainable growth, and diverse grow types and quantities of games. Among the many, the theme of horror circulates in the market. Ahead of placing orders, the poster initiates the first exchange with the game, players and consumers, and affects buyers' behavior and cognition subject to its color. What is an eye-catching poster? Different games have different styles and philosophies, so it leads to a certain degree of variation in the poster design of each game. In order to study the common points of popular game color design. For the top 10 most acclaimed horror games on STEAM (PC), 5 to 6 color elements were mined from each poster for analysis and offered suggestions on poster design. First, in the color selection, more warm colors are on the list of recommendation, such as yellow, you can also choose cool colors such as blue. Second, high-saturation and high-brightness colors speak for better choice. The design of color is not absolute, and this thesis only analyzes the posters of commercially circulated and well-received horror games. It is hoped to provide insights for user-friendly interface design, support and understanding of user behaviors.