How to change window color in windows 8?

Question

Windows

I will finish now in general, I have been looking for an hour how to change the background color of windows in windows 8.1.
I’m already used to a gray background, it seems easier to my eyes and for one I use a white font color, for text that does not need to be printed, for example, for some auxiliary cells in excel or in order to print text on an already printed sheet in word.
And most importantly, I already did this, I found a solution on the Internet, it was done through the registry, it turned out crooked, but at least somehow, but now I can’t find it, I find only a million tips on how to change the color of the borders or the title of the window and so on.

Answer 1

First link on google

Answer 2

Right upper corner. Gear below. There, the computer settings will open on a white background. There is also a theme setting.