To start, open an existing Google Docs document or create a new file to edit. In the open document, click File > Page Setup to access your page settings menu.

In the “Page Setup” box that appears, select a new page color by selecting the circular “Page Color” icon.

This will display a drop-down menu showing various preset colors.

Click on one of these color options to select it as your page color, or choose the “+” icon at the bottom (under the “Custom” label) to create a custom page color instead.

In the custom color menu, you can insert a hex color code (for instance, #000000 for black) or use the color matching tool to find the color and shade you want. Move the “Hue” bar at the bottom to select the primary or secondary color you want to use and then pick a shade using the color matching tool above.

Click “OK” once you’ve found the color you want to use.

Once you’ve chosen your page color, select the “OK” button in the “Page Setup” menu to apply it to your document.

This will apply the change to all pages in your document.

Unfortunately, it isn’t possible to apply different colors to separate pages in a Google Docs document. To achieve the same effect, you’d need to spread your content over several Google Docs files and edit the page color for each document separately.