The appearance or look-and-feel of your website is template driven.
This includes the colourscheme, fonts and graphic elements of the website structure but does not include the graphics within the content.
This means that should you wish to change the appearance of your website at a later stage it is easy to do without affecting the content in any way.
The cheapest and quickest way to get going is to choose a commercially available template to get started. This can be further customised to suit your own corporate identity and colourscheme. While there are a number of Joomla template sites out there on the web click here to review the ones we recommend.
The alternative is to commission a graphic designer to create a website mock-up or design for you. This can then be converted into a template for use on your website. While this route is more costly it does mean that you will get a unique design rather than a commercially available one.