OK, you are on an Insider version. This is not the mainstream version I'm using. Meaning that Microsoft has finally yielded to customers' massive complaint about the stupid error of the title bars, but we of the mainstream will have to wait maybe a few more months to get the update. If it arrives at all. With Microsoft you can never know.
I initially ran a an Insider version in a virtual machine and it had the 'normal' colour scheme showing a difference of active vs inactive windows. I removed this installation because it became unstable due to all the remaining bugs and foreced updates. Then, after win10 was officially launched, installed the 'normal' version on a test machine. Poof now the coloured difference active vs passive windows had disappeared and according to Microsoft this was a necessary 'feature'.
I hope you selected a custom update option otherwise Microsoft will run automatic updates of which you cannot reserve against the unwanted ones. Plus they mine your computer for information and send the data back to Redmont. Don't be surprised if a feature you rely on today is gone tomorrow.