I'm literally having the same problem right now and it's 2019! The new Premiere just came out too, so I don't know why this bug exists. Is there a solution out there? For now, I'm doing this workaround but why won't the tech work properly? My monitor shouldn't matter how color picker interprets footage...
I have latest Premiere 2017.0.2. New laptop with Win 10 and Nvidea card. Color picker issue is definitely with display card/monitor setup. I have two monitor setup (laptop and HP Zdisplay monitor) and noticed earlier on that Netflix and Fandango will not view on my HP (2nd monitor). When I view Premiere from this same monitor and try to pick a color it does not work. When I move Premiere to 1st monitor(Laptop ), it does. Quick Solution is to move Premiere to main monitor. I will have to figure out what the display issue is later. No time to troubleshoot today.
Sorry about that.
My colleague Mitch Wood advises, "Are you using multiple monitors? Try moving the effect control panel to the primary monitor. This might be an issue with your monitor config/display card."
Please try that. Also, upvote the following bug report: FIX - Ultra Key color picker on Windows 10 PLEASE!!!!!!!!!!!!!!!!!!! – Adobe video & audio apps
No joy. The color picker eye dropper will not leave the color picker box. The workaround is to select the color picker tile and use THAT color picker to select a color. Obvious and persistent bug. Damage to productivity. Needs a fix double quick.
Worked like a charm! Thanks. It sucks but it it's a nice wowrk around.
Legend. Thats exactly what it is.
I had the same issue on a new Lenovo X5 (Core i7) with 2 monitors attached through a Lenovo ThinkPad USB-C dock. I use the large monitors for my editing work flow and the color pick failure was very frustrating. Tried then dragging to main (laptop) screen and it worked instantly!
I've had this problem for so long, I took to using other software to get the hex code for the colour to remove then entering manually in ultra key.