It's preferable not to store chocolate in the fridge, which raises the humidity hugely, due to condensation (which may give the chocolates a dull appearance) and other aromas (fruits, vegetables, meats) that may infiltrate the chocolates, giving them an unpleasant taste.

The best way to store chocolate is in a metal box, like a biscuit tin, away from light and moisture, preferably somewhere cool (16-18°C).