A new theme called Opposite Day was released by Microsoft last Tuesday and can be downloaded for free by those of you running Windows 10.
That's it new theme Opposite Day contains 15 high resolution photos, which are installed on your computer, as wallpapers. They depict the contrast of two similar things, playing with colors but also with black and white.
The theme is only for desktops and laptops, and the minimum requirements are: Windows 10 operating system version 14951.0 or later, with Architecture x86, x64, ARM, ARM64.
Of course it is free, it has a size of 14,73MB and you can download it from the Microsoft Store.