The effects of a color profile are sometimes subtle and it may be hard to see if anything much has changed.
The system comes with several profiles for testing that make it very clear when the profiles are being applied:
This will turn the screen blue and tests if the calibration curves are being sent to the display.
Open the Activities overview and start typing Settings.
Click on Settings.
Click Color in the sidebar to open the panel.
Select the device for which you want to add a profile. You may wish to make a note of which profile is currently being used.
Click Add profile to select a test profile, which should be at the bottom of the list.
Press Add to confirm your selection.
To revert to your previous profile, select the device in the Color panel, then select the profile that you were using before you tried one of the test profiles and press Enable to use it again.
Using these profiles, you can clearly see when an application supports color management.
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