Decorations - Background Colour
Background Colour comes under Decorations category in Style Manager. As the name suggests, this category under the Style Manager contains styling properties to decorate a component by adding colors or images in the background.
How to Add Background Color in a Component
As you click on the component in which you want to add background color, the Style Manager of that component opens automatically in the Right Toolbar. You only have to go to the Background Color settings under the category, "Decorations" and pick a color of your choice from the color palette.