The use of a border is understated but strong aspect of design that can change the way a page of text looks completely.
There are two types of borders used in web design. The border around a piece of text and the border around a webpage. The border around a piece of text is the space between the text and the website itself. This is used to create space between blocks of text, which can make it easier to read.
The border around a webpage is the space around the edge of a page, usually coloured or detailed in a way which defines it.
These two types of borders play a large role in how the webpage is read. Everything on the page is defined by the size of the borders, so varying the size of the borders can have a dramatic effect on the way that the page is read. Using different coloured borders works in much the same way, changing the way the page looks entirely.