For some reason Microsoft decided to tie the colouring of title bars in 1511 to the colouring of the taskbar and start menu.  If like me you quite like a black taskbar and start menu but not white title bars, then there is a registry tweak that you can use. http://www.windowscentral.com/windows-10-colored-title-bars-default-dark-theme Works really well for me.  Obviously I don't endorse this and you do it at your own risk.