One can get dark mode of application by using Neight Mode availble as optional default of Android 9.0 But it makes all application in dark mode.
Other method to get it by choice for Android 8 or lower. It is more preferable to get dark mode of individual application by choice as all application are not lovable in dark mode.
I am surprised why we do not get Sepia colour or Eink colour mode which also may be using low power.
