For PD uniforms, they tend to be black, but NATO Black will suffice. Where you can add contrast is in the raid vests, they are often "bluer" if not outright blue in actual practice.
Another note--if that is a COPS crew (or an NYPD documentary crew) they's be given protective gear--vest and helmet, typically. These would not be raid vests, but would have similar protection. The vests would be an off-white or khaki color, and utterly devoid of markings. Camera guy will have a crooked helmet; the sound guy will be near invisible in his size-or-two-too-large "pot."
The Dragnet movie featured the prop-house M-114 conversion to house-breaker. (Which may or may not have been funded by LAPD or LASO, then quietly auctioned off, where the prophouse collected it up.)