You can figure out a mood sometimes with colors! If you use happy colors like red orange yellow sometimes green or blue you can see a happy or delighted mood.
If you use the colors blue,purple sometimes dark green you can tell it's rough or dark and sad or angry.I hope this helped!
The term theme can be defined as the underlying meaning of a story. It is the message the writer is trying to convey through the story. Often the theme of a story is a broad message about life.