A full brightness white pixel uses 5.8 times more juice than a black pixel. That doesn't mean you could ever increase your battery life by 5.8 times. That's for 2 reasons.

There's a new mod for Dark Souls and Dark Souls II that strips the game of its textures, colors, and effects, leaving the landscape a startling, discomfiting black and white.. It's quite striking ...

Instead of subjecting yourself to bright colors and blinding white menus, you can turn on dark mode. ... If you want windows that are distinctly black, disable Allow wallpaper tinting in windows.