Create your custom background image for your Haiku® desktop with the Haiku Background Image Maker.
The Haiku® operating system by default has a blue desktop background color with the Haiku® logo on it.
Since you can set up multiple virtual desktops (“Workspaces”), you might want to set different colors for each desktop, but you don't want to do without the typical Haiku® logo. This will help you to reach your goal very quickly.