Final answer:
To change the background color of a Word document, open the document, click on the 'Design' tab, then select 'Page Color' and choose the color you desire from the palette.
Step-by-step explanation:
To change the background color in a Microsoft Word document, follow these steps: Open the Word document where you want to change the background color. Click on the 'Design' tab located at the top of the Microsoft Word ribbon. Within the 'Page Background' group, click on 'Page Color'. Choose the desired color from the dropdown palette.
If you want a specific color not displayed, click on 'More Colors' to find more options. Note that changing the background color in Word changes the color on the screen and if printed, although some printers may not print the background color unless certain print settings are adjusted.