gpick is a great and simple tool now that I now how to use it
sudo apt-get install gpick
The trick is to find "the swatch"
I was in a rush and was frustrated that it wouldn't work how I expected and I had to memorize the hex code of the color my mouse was over.
There is something it tells you to do which is "Click on the swatch area" (click onthe honeycomb graphic area that is the swatch) and then whenever you hit the "spacebar" the code will be recorded on the right side for you to copy and refer to later.