Capes can be any color!
To know what color a cape is, you need more information:
* What kind of cape? A superhero cape might be red, a traditional Spanish cape might be black or red, a winter cape might be brown or gray.
* What is the context? Are you reading a book, watching a movie, or looking at a picture? The context will help determine the color.
Let me know if you have more details and I can help you figure out the color!