When to Use a Link
Buttons and links serve different purposes: buttons are used for actions, whereas links are used for navigation. Avoid using links to indicate actions, even if they are secondary. Links should be used when a user is directed to a new section, page or website.
As a general rule, if the user is making changes to the back or front-end of the site when clicking, you should use a button. If the user is being directed to a different page, you can use a link.
If a link is bringing the user to an external web page, this should be indicated using an icon and the page should open in a new window.
Links should not exceed one line in length, and be applied to 2-4 key words rather than a full sentence or line.
Links should always include a hover state and a visited state, and should look different from the rest of the text. In this system, links are displayed as follows:
Regular: Nunitio Sans Regular at 16 points
Hover: Nunitio Sans Regular at 16 points
Visited: Nunitio Sans Regular at 16 points
There are other colour options for visited links. Best practice for visited links is to use a muted version of your hyperlink colour, a secondary colour or the standard purple: #551A8B.