Adobe InDesign offers two primary methods for altering the background color of a document: creating a rectangular frame to cover the entire page and filling it with the desired color, or modifying the [Paper] color within the Swatches panel.

Method 1: Utilizing a Rectangular Frame

1. Launch your InDesign document.
2. From the toolbar, select the Rectangle Tool (M).
3. Click and drag to draw a rectangular frame that encompasses the entire page.
4. Fill the rectangular frame with the desired color.
5. To send the rectangular frame to the back, right-click on it and choose “Send to Back.”

Method 2: Modifying the [Paper] Color

1. Open the Swatches panel (Window > Swatches).
2. Double-click on the [Paper] swatch.
3. From the Color Picker, select the desired color.
4. Click “OK.”

Additional Tips

• To apply a different color to specific pages, create a master page with the desired color and apply it to those pages.
• Patterns or gradients can be used as page colors by creating swatches for them and applying them to the rectangular frame or the [Paper] color.
• Ensure your printer can reproduce the desired color if you intend to print your document.

I hope this article proves helpful. Please let me know if you have any further questions.