[STUDIO] Should You Make the Back Page of a Coloring Book Image Be Black or Gray?

You don't have to have your back page of a coloring book page a solid color, black or grey, but there may be some bleed through when the person colors. Generally I like to use a dark gray over black.

You should put the images to be colored on odd numbered pages and the solid color, black or grey on even number pages.

On a blank page, just pick the page color icon on the top bar and select a color and apply. From there, you can right click on that page and then pick clone. Then pick even number pages on the top of page selection page. Then click Clone.