hello i am also facing the same problem now
my lenovo laptop integrated webcam is just in black and white and it is black and white in all apps.
i am not able to solve the issue i tried to reset the app and i also perforemed the 'rollback'
but nothing happened it is still in black and white only.
please can anyone guide me out of this problem . i will be very thankfull if anyone helps "this is a new laptop and is under waranty" just to inform.