Dark mode will look something like this:

Home Screen	Filter Screen	Edit Screen	Main Screen

Hex code for black used: #000000

How to implement dark mode?

1. Create a class to fetch the current theme state from shared preference. Add methods to read, write & delete data to and from shared preference.
2. Add a class to contain ThemeData for light and dark mode. Add method to get current theme. Add methods to set light theme and set dark theme. Store the state to shared preference using the above class you created.