Open TickTick on your Android device > Swipe to the right and unfold the left sidebar.
Tap Add List at the bottom.
Enter a name for your list and choose a color. This menu also allows you to assign the new list to an existing folder or create a new folder to collect the list.
P.S. Task colors in the calendar view depend on their parent lists' colors. Therefore, setting different colors for different lists is quite important.