/lib/udev/rules.d/95-cd-devices.rules is in colord 1.2.12-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# Copyright (C) 2009-2011 Richard Hughes <richard@hughsie.com>
#
# Licensed under the GNU General Public License Version 2
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# Devices that may have profiles.
#
# These are properties defining the behavior:
# COLORD_DEVICE Can be assinged a profile
# COLORD_KIND The kind of device
# video cameras
SUBSYSTEM=="video4linux", ENV{ID_V4L_PRODUCT}!="", ENV{COLORD_DEVICE}="1", ENV{COLORD_KIND}="camera"
# Cameras with gphoto drivers
SUBSYSTEM=="usb", ENV{ID_GPHOTO2}!="", ENV{COLORD_DEVICE}="1", ENV{COLORD_KIND}="camera"
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