In Lightroom CC, I create a graduated filter. I want it to give it a color, so I click in the grey box, which brings up the colorpicker. I understand that you can pich a color from the photo by clicking in the box with the colors, then hold and go to the photo and let the mouse button go, LR will pick that color. That doesn't work with me. If I click the mouse button and leave the color box, the cursor in the color box drops to zero saturation and does not move with the colors in my photo that I go to with my pipet. It does not pick up the color.
Same problem here! Picker does not pick colors on the image window (it does outside the Lightroom window!!)
I did find the problem occurs when preferences are set to use the Graphics Processor.
Turn the GPU off and the color picker tool reverts to working on the image window.
Wow!! That is a great tip! But weird anyway. Thanks