Deep bright red that you see in the book cover was a common colour for printing and books in the late 19th century and early 20^th century. It is likely it was an easily available and inexpensive dye colour, as well as one that had a rich look. The small box that used to hold thumb tacks reflects that same red, and it stands out against its cream background. www.edgee.net/how-to-apply-the-7-elements-of-design-to-your-work-element-7-colour/ The tin section and the red checkers piece draw that colour in from the rest of the design, 9”x 11”.