How do I change a mockup background or book color?

Templates with editable color layers show a color swatch and hexadecimal color field. Click the swatch to choose a color, or enter a value such as #1A2433 in the hex field. Depending on the template, the editable layer may control the background, book edge, page area, or another object.

Some templates also include optional layers that can be turned on or off. If a template does not show a color control for an element, that part of the original mockup is not editable.