The front-end of a Joomla site, such as what our visitors and members interact with every time they come to BuildaJoomlaWebsite, gets its look and feel from the installed and enabled Template that is managed from the Administrator.
The front-end of a Joomla site gets its layout, color scheme, fonts and other attributes through similar code and methods that a non-Joomla site does. CSS style sheets determine much of the look and feel of a Joomla website's front-end.