Why is my chocolate fudge not that dark? A UK chain's chocolate fudge is very dark. When I do chocolate fudge it comes out more looking the colour of milk chocolate. Is this because they use whipping cream or for some other reason?
It's possible that you need to add more chocolate, or use a different type of chocolate.  Dutch process cocoa has a much darker color than natural cocoa, for example.

It's also possible that the color is being lightened by microscopic air bubbles.  This can happen if you use a fluffy ingredient (such as marshmallow cream) or if you mix a lot of air into the fudge.  Although, I imagine it would take a lot of air to make a big difference.

If all else fails, try dipping pieces of fudge in dark chocolate.  I know that's cheating, but who's going to argue with chocolate covered fudge?  Sounds good to me!