Consistency
 

The colours, fonts and layouts of all the pages of your website must have a certain amount of consistency. When users move from one page of your site to another, they should feel a smooth flow rather than an abrupt change. Thus, you must keep the colour, font and layout of your site basically same for all your pages, with changes only in the other elements on the pages.

Conformity in the application of something, typically that which is necessary for the sake of logic, accuracy, or fairness.

consistent behaviour or treatment, the way in which a substance holds together; thickness or viscosity.

Conformity in the application of something, typically that which is necessary for the sake of logic, accuracy, or fairness.