PLEASE enable a dark mode that switches the default background colors for the whole app (window header, menus, notes list, and the notes themselves) to dark gray or black and the default text color to light gray or white (user-selected text colors would of course override, but be adjusted for viewability). People who use the app a lot have been trying to tell you their eyes are bleeding. You've implemented this for Android (THANK YOU!), so you know how to make it work from a practical standpoint. Perhaps it's difficult from a programming standpoint, but PLEASE put the work in to make it happen. Your users' eyes will thank you!
I know there's a popular request out there already to be able to change the background color of just the notes themselves. That request has been floating around for 8 years and has garnered support, but no action. Obviously, if you implement that, any user-selected note color would override the dark gray/black background in that note.