It appears it is not possible to use 'a:hover' in inline CSS since it only applies in the context of a style sheet. The way to achieve hovering behavior with inline styles is to use the onMouseOver and onMouseOut attributes inside the 'a' tag. For example:
<a href= "www.google.com" onMouseOver="style.color='green'" onMouseOut="style.color='blue'">google.com</a>
I hope this answers your question.