I'm trying to use the Gnome Color (default Color app in
/usr/bin/gnome-control-center.real color) to manage my laptop's color profile. However, only some of the color profile actually change the display colors!
For instance, PJD7820HD, E551i-A2, EQ276W HDMI, Projector, DVX-3150, D65 and Swapped Red and Green (!) all display the same colors. Whereas Blue, D50, and D55 are the only profiles that change the display colors.
Why is it that some of the profiles work, but some don't? I noticed that in the description for Blue, it says it works by "altering the video card lookup table" - maybe this is what D50 and D55 do as well.