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Styling Links
a:link
This pseudo-class is associated with a link that has not been traversed
a:visited
This pseudo-class is associated with a link that has been traversed
a:hover
Indicates that the user hovers over the element
a:active
The link has been activated and is in the process of being performed.
a:focus
Indicates that the element is selected for keyboard input
a:link {background-color:yellow}
a:visited {background-color:pink}
a:hover {background-color:white}
a:active {background-color:lime}

Browser may skip some of these rules if not in correct order: LVHA