Change the background/margin colour?

[ghost]

If my screen is bigger than the page, there will be a background above and below the page of the book that's a different colour than the colour of the page. Is there any way to change this colour, or to make it the same colour as the page? The difference is very distracting when reading.

[Notsusp]

You can change the color of the page itself to better fit the background -Open a book -Tap the lower center of your screen -Enter the settings above -Change the color of the page.