E:active

The :active pseudo-class applies while an element is being activated by the user. For example, between the times the user presses the mouse button and releases it. (Source: W3C)

HTML:

  1. <p><a href="http://w3.org">Link to the W3C website</a></p>

CSS:

  1. a:active{color:green}

Output:

Link to the W3C website

In the example, the link should turn green when it's clicked (keep mouse down to see effect).