Color contrast has a fundamental function, because it is contrasting colors that arouse interest and, at the same time, intrigue who sees it. For that reason, if you wanted to create a poster for a show, contrasting colors (such as yellow and purple) would make this poster much more appealing.
The analogous colors are those that are close to each other within the chromatic circle, as is the case of the colors yellow, red and orange. These colors do not provide much contrast when used together, so they are not recommended for the show's poster.