/etc/colord.conf

On Linux -

[colord]

# This controls whether we search external volumes for color profiles.
#
# default=false
SearchVolumes=false

# If we should create a dummy sensor for testing
#
# default=false
CreateDummySensor=false

# If we should use SANE to add scanner and camera devices.
#
# If SANE support is installed then this will allow colord to manage
# all scanners that SANE can detect, including remote scanners.
#
# If this is disabled then colord will only detect locally connected
# scanners.
#
# default=false
UseSANE=false

# If we should always use the XRandR name as the DeviceId
#
# If the user has two or more outputs attached with identical EDID data then
# the client tools cannot tell them apart. By setting this value the 'xrandr-'
# style device-id is always used and the monitors will show up as seporate
# instances.
#
# This does of course mean that the calibration is referenced to the xrandr
# output name, rather than the monitor itself. This means that if the monitor
# cables are swapped then the wrong profile would be used.
#
# default=false
AlwaysUseXrandrName=false

# Known profiles are specific colorspaces that applications may request,
# e.g. 'adobe-rgb' or 'srgb'.
# This key sets up any manual overrides that are not automatically added
# using the profile dictionary metadata.
#
# default=
StandardSpaces=