The theme is using text-underline instead of a color change when you hover over it. This does make sense in my opinion and it’s very common amongst themes/sites (look at any of the recent StudioPress themes).
So this isn’t an actual issue, but rather a personal preference. We can easily change this by adding something like this to the css –
.site-footer a {
color: #fff;
}
.site-footer a:hover {
color: #293F5E;
}
….and of course you could change this to any color you want.