configuring colormgr/colord via command-line

Hi, I am trying to set up color management in MX Linux (XFCE). The trouble is, if I type “colormgr get-devices” there is no output (gnome-settings-deamon is installed).
(I have 2 screens, setting profiles with Displaycal does not work because the system forgets and/or confuses the profiles if I switch between the screens. In theory, I could set up the profiles directly in the applications, but I need to use Chrome because Firefox produces horizontal lines while scrolling, but the screen profile cannot be set in Chrome/Chromium.)
Can anybody help?
Thanks in advance
b