Yes I have saved the theme with the color tweaks applied, however everytime after reboot the colors changes again, when I checked the theme were applied a "no saved theme" (or something like that)...

Sleep and resume from sleep don´t change the colors.

Thank you for your help.

No, the only thing that changed on reboot was the colors tweaked with the "registry trick" (background color of the apps like Word, Excel, etc.), however since I did the changes in the "Local Policy...

Sorry I don´t understand the last question.
I was able to change the colors with the registry trick, however when I turn off or reboot the colors back to default (255, 255, 255), when I did the...

dalsina, I reboot and then try again and it worked :)

Also I have discovered a way to avoid the colores return to default after reboot: you must go to "Local Policy Editor" or something like that...

Thank you dalchina for your reply, however how I said the "registry hack" doesn´t work in my Windows 10 PRO Anniversay, nothing happens :(

Hi, thank you all for you tips helped me a lot. Right now I am using a low contrast theme from Devianart in my Windows 10 PRO Anniversay (1607), today (thanks to you guys) I discover QTTabBar and...