Long shot… I don’t suppose that colour is going to end up in photoshop once you’ve selected it is it?
Probably a “heavier weight” solution than you’re looking for… but just in case it does match up with your end goal…
If you do already have photoshop running you can use the eye-dropper tool to sample colours from anywhere on your desktop, not just from within photoshop itself. With the eye-dropper selected click down on the PS document but then drag to the colour on the desktop / other window that you want to sample.