This thing is not needed in almost all cases, since there is already a 16-bit and 256 color modes available for program only.

The 16-bit desktop color requirement is absolute for the game Spirit: Stallion of the Cimarron – Forever Free

This game, when run with "Best" graphical setting, uses Direct3D8 and renders many textures in X8R8G8B8 format. Unfortunately the content of these textures is processed/displayed correctly only if the desktop color is 16-bits (tested on Windows 7 and XP)

I have tried all popular available wrappers - dgVoodoo2, DDrawCompat, DxWnd and WineD3D, neither of them helped. Is there any idea or a way to force a 16-bit color desktop on Windows 10 and 11?