Can you have the color picker window open in the center of the scree, or at least make sure that it's always on the screen?
It appears to open at some location relative to the button.
On my 2017 Screen, my color picker buttons are at the bottom corner, and always open partially off of the bottom of the screen. Today I had a user with a lower resolution laptop, that says the color picker window opens completely off the screen, so he had to edit the colors by editing the .pro file.
Thanks.