Archetypes and Symbols in Beauty and the Beast

Throughout this movie, there are many different styles of contrasting symbols that we can relate to and have all seen before. There is an extreme distinction between light and dark. You are first taken to a small light and happy village, symbolizing peace and a sense of security. Then later contrasting it with a dark, gloomy and eerie fortress which later on turns into a gorgeous and bright castle, welcoming anything or anyone into it.

The dark, and depressing colors include black and grey and are used all through the dark interior of the forbidden castle. It provides an impression of chaos, mystery and evil. With the red carpet running down the halls of every corridor(a sense of death and treachery) , the castle gives the viewers a terrible first impression, letting us come to the conclusion that this castle was never meant to have anyone enter it. Why does the narrator give us this false impression of what really lies behind those castle doors? Is the sudden dramatic change from dark and gloomy to light and happy something we can distinguish in other films?

A Hero's Journey

Samurai Jack is just one example of the many different types of Heroes that are displayed through literature, films, and even in real life experiences we can come across someone who may act like or have Hero-type attributes. In every story or book there is either a love story involved or have an action based story, with a protagonist and an antagonist. There are even some with a bit of both.
An example of this would be Hercules. The story Hercules has a hero, a mentor, and several creatures of nightmare. Part of Hercules' journey is to go through many years of hard training and trials defeating many evil creatures. This is just an example of the basic hero's adventure.
Does a hero always go through training and trials to become a hero or is the hero identity just put upon a person? Does one great deed done for humanity worth titling someone a "hero" or does there have to be more?