For God's sake can someone give us a note with a black background?
You have a pretty awesome app but it lacks what all the rest lack - a dark (black) background.
You need to beat competition...most people want that.
As Tony described in the comments, this is already possible. Either create a new note with a blank background and choose the desired color, or change the background of an existing page by going to the Page Settings.
You can create blank black backgrounds, if that is what you're talking about. Page Settings > Color (if Background is Blank)