Social Links hover effects

How do I change the hover effects for the social buttons? In particular, I'd like the background to be white (it's currently reddish), the foreground (the image) to be #28b3c5 (it's currently bluish), and for there not to be an underline. I'll probably play with the colors once I see it, but it's a good starting point. https://miboxdallas.com Thanks!