Scrolling a List of Buttons on WebKit and V8 - active state

I have a list of buttons reacting to the :active css3 pseudo class by turning orange.

My Problem is that I want to scroll that list on mobile touch devices but the buttons shall not get orange by the pure scrolling. It shall get orange immediately when the user clicks, though.

It is worth noticing, that we are in an AngularJS app and ngTouch is loaded for avoiding the 300ms click delay. I know the problem has something to do with that, but I'm currently stuck...