Unfortunately we can't tell without recalibrating whether a device profile is accurate. We can use a simple metric of the amount of time since calibration to determine if a recalibrate is recommended.
Some companies have very specific timeout policies for profiles, as an inaccurate color profile can make a huge difference to an end product.
If you set the timeout policy and a profile is older than the policy then a red warning triangle will be shown in the Settings ▸ Color dialog next to the profile. A warning notification will also be shown every time you log into your computer.
To set the policy for display and printer devices, you specify the maximum age of the profile in days:
[rupert@gnome] gsettings set org.gnome.settings-daemon.plugins.color recalibrate-printer-threshold 180 [rupert@gnome] gsettings set org.gnome.settings-daemon.plugins.color recalibrate-display-threshold 180
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