I am on W10, 64-bits. I access my Hotmail.com account using Chrome. My Tab bar is blue. So was the Tab bar on my wife's Hotmail.com page, opened using the "In Private" window from my own page. However, recently, and probably due to some mystery wrong manipulation on her - or my - side, her Tab bar - and ONLY hers - is now black, which she does not like. I am not a geek, but I have managed to find how to change the Tab bar color, but this applies only to my Hotmail page, NOT TO HERS, which remains stubbornly black. Coud someone kindly tell me how to proceed ? As detailed as possible please, again, I do not master Windows beyond the very basic !