How to take screenshot of calibrate dialog that requires tool

[scootergrisen via gnome-doc-list]

I wanted to take a localized screenshot of 
https://gitlab.gnome.org/GNOME/gnome-user-docs/raw/master/gnome-help/C/figures/color-profile-default.png 
in settings screen color calibration but the calibrate... button is 
disabled. I don't have a tool for screen calibration.

How can i open the dialog without having the tool so i can take the 
screenshot?
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