Well hung beef shouldn't be pink anyway more a dark red to brownish colour with nice yellow fat and marbling.
They have special light in supermarket meat cabinets to make the meat look pink and attractive.Plus the plastic they wrap it in can react to make the meat a funny colour.
Always store fresh meat in the bottom part of the fridge to prevent any blood dripping onto other food.I wouldn't store it in a plastic container ..just on a plate loosely covered with tin foil or another plate upended.
A good cut of steak should be O.K for a couple of days from fresh ..if it has been frozen then I would eat it as soon as possible.
You can eat steak the next day cold if you wish !
As for KFC ..can't help you I'm afraid ..something I have never eaten and could never imagine wanting to eat !.