"This is really exciting" at least in my way of thinking, "QuickBooks Online has gone dark!" After years of staring at the blinding white screen, QBO has launched dark mode. The QBO dark mode is a way to view your monitor and work without killing your eyes. Another awesome reason to go dark is that it looks cool, and well, that’s a totally acceptable reason to transition to 'the dark side'.
QBO 'Themes' Dark Mode option from QuickBooks Labs