Check the Opacity of All the Squares because It seems that all the square have less Opacity due to which you're getting such colors using color picker.
All the Squares Opacity as default 100%.
I recently have the same issue. Same opacity, just the eyedroper doesn't seem to work well anymore. It always make a different color except with a perfect red.
If your are on a Windows OS, can you try updating graphic drivers on your device by visiting the manufacturer's site? If you continue facing issues, get in touch with us using this link https://adobe.ly/2WYE62m Use the chat button to get started.