[colord] Different results when applying the same icc profile in "Color" GUI application and directly in color managed apps

[Dmitry Safonov]

Hi,

I'm trying to fix the oversaturated colors on my Dell XPS 15 laptop with a
4K IPS panel running Cinnamon desktop environment on Fedora.
I did a considerable amount of googling and unsuccessful experiments, but
there is one finding for which I can't find an explanation,
and I have a hope that members of this list can shed some light on this.

One of the things I tried was playing with color profiles which other users
of the same laptop shared on the internet.
I did see a noticeable change in picture when I imported and selected those
profiles in a standard "Color" gui application, but overall the results
were disappointing.
I understand that the color profile created for one particular screen does
not have to provide good results on a different screen,
so I accepted this attempt as a failure.

But at some point of time I tried to use the icc profile from the internet
in Firefox, which has a way to manually assign an icc profile, and the
colors in Firefox got almost perfect, the
change was very noticeable and pleasing. Then I also tried to specify that
profile in GIMP, and the results were also great.

So my question is: why using a specific icc profile in a color managed
application (Firefox, GIMP) gives one result, and using the same profile on
a system-wide level (which, as far as I understand, should be related to
colord) gives completely different result?

Thank you for your attention.

-- 
Regards,
Dmitry
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