Temas
From Joomla! Documentation
Temas ou templates são um tipo de extension Joomla! que muda o visual de um site. Existem dois tipos de temas usados pelos CMS: Temas de Front-end (Site) E Temas de Back-end (Administrador). O tema de Front-end Template controla a maneira como o projeto é apresentado ao visitante do site. O tema de Back-end controla a maneira como o administrador é apresentado aos administradores do site. Isso inclui tarefas comuns como usuário, menu, artigo, categoria, módulo, componente, plugin e gerenciamento de temas.
Veja também: Component/pt-br, Module/pt-br, Plugin/pt-br
Ver também: Extension types (general definitions)
Template Types
There are two types of templates used in a Joomla CMS powered website.
Front-end Templates
Front-end templates change the way your site looks to average users. Most of the templates you use or install will be Front-end Templates. Out of the box Joomla 3.x ships with two front-end templates, protostar (which is set as default), and Beez3. For simple sites these out of the box templates may be appropriate, but a majority of Joomla users will opt to install a third party template to suit the purpose of their site. A site can use multiple templates assigned to different menu items, but most beginners will just use a single template for their entire site.
Back-end Templates
Back-end Templates are much rarer than Frontend Templates. You will probably never need to change your Back-end Template. Back-end Templates allow you to change the way the administrator interface looks. Joomla 3.x ships with two back end templates, isis (which is set as default), and Hathor. The Hathor template was designed for accessibility, and may be appropriate for those with color blindness who require high contrast colors, or those using screen reader devices or keyboard navigation.
Recommended Reading
Administrators
Joomla administrators should go to the page on Template Management for topics about managing your Joomla template or templates.
Developers
Joomla developers should go to the Template Development portal page for more topics on developing a Joomla template.