I am trying to change the color of my links to white when hovering the mouse over them in my footer. Does anybody know what type of code injection is needed to do this?

I am trying to change the color of my links to white when hovering the mouse over them in my footer. Does anybody know what type of code injection is needed to do this? 

You can use this code to Website > Website Tools > Custom CSS. If it doesn't work, you can share site url, we can check easier.

footer.sections a:hover, footer.sections a:hover span {
	color: white !important;
}