Yes, this is possible. You can do this using colors from the Copic palette, or using custom colors not currently in app.
To set a Copic background color:
- Open the Settings menu.
- Under Workspace > Background, select Custom Color.
- This will open the Copic color wheel. Choose a color from the wheel to set it as your background.
To set a custom background color:
- Use the color picker to pick your custom color from a photo or screenshot.
- Draw a stroke with the color you want to use.
- Select the stroke and tap the paperclip in the pop-up to copy the stroke to the iOS clipboard. This also copies the color to the color clipboard on the color wheel.
- If you don’t want it hanging around invisible on your drawing, tap the trash icon to delete the stroke.
- Open the Settings menu. Under Workspace > Background, select Custom Color.
- The inner ring of the color wheel that appears will have the color on your clipboard (next to black). Tap this to set it as your background color.