Theme

You can change the app's colors by going to Left menu > Settings > User Interface (settings is near the bottom).

Setting	Description
Income color	the text color of income numbers in the list of incomes
Expense color	the text color of expense numbers in the list of expenses
Display style of digits	the currency format, including currency symbol ($), thousands group separators (1,000), decimal rounding (0.88 -> 1), and +/- symbols in addition to expense/income text color
Date format	the date and time display format to be used in all app menus and listings
First day of week	used to determine week start date in weekly grouping mode, and also the calendar
First day of month	used to determine month start date in monthly grouping mode, and the calendar
Grouping	changes grouping of transactions in the transaction list and the graphs in the overview menu (daily, weekly, monthly, or yearly)
Color primary	color of the top app bar and the color of selected text
Color secondary	color of other UI elements in the app like buttons and toggles
Type	Light, Dark, Deep dark