@Romal: Can you please post your own thread instead? Your question isn't even related to the OP's question.
@catecake: You already have a hover effect where the icon appears to "pop" out from the page. It would be a bit more challenging to do something like changing the color of the icon because the icons are created via images. You'd probably have to do something like create a new set of colored icons that would be used for the hover effect.