You can disable color filters by unchecking the following option: ‘Allow the shortcut key to toggle filter on or off’. To revert back to normal colors, use the same key combination again. you could have simply done this by accidentally pressing Windows+Crtl+C hotkey. If Windows 10 has gone Black & White, that could be because the grayscale mode was activated. Windows 10 Turned Black and White Issue (Solution)
You can compare it with the images below, which show different color filters enabled in Windows 10. The below image also shows the default background color before color filters have been enabled.
Furthermore, you can enable the Windows+Crtl+C hotkey for quickly enabling or disabling the default color filter. You can turn on color filters by sliding the ‘Turn on color filters’ option shown below. Now, click Color Filters to head over to the menu for toggling colors between various filters offered in Windows 10.
