Hi there, Chris.
This is a known issue with the latest version and has also been discussed in this thread.
All we can do for now is wait for a fix 🙂
Technically, the selected color is correct (the color that should be at the x & y coordinates of the selector), it's just that the picker area itself has something like a dark gradient on it.
Thanks for letting me know 🙂
Yeah, it's impossible to select colors with that thing aaargh