Consistency applies to a whole lot of things. It can denote the background color of the website. For example, one color should be used, so that end-users would know that they are still on the same page and
not a different one. Consistency, could also be the branding of the websites that usually promotes the site owners company or organization. In this scenario, a logo used at the header of a site must also be used in the body and other parts of the site. This reminds the end-user of what the site represents and its owner.