How do I find out HEX codes of colors I used in my gradient?

Hi, all:

I have a simple Illustrator problem, but I cannot find the answer online or in the Adobe Forums.

I made a gradient, but I do not know the HEX color codes I used for the colors. Unfortunately, you cannot double click the color swatches on the gradient pallete to open the color picker. Meanwhile, the gradient pallete does not identify the colors in use (the colors one has placed there). Does anyone know how to find out what colors have been placed on the gradient pallete when you forget?

Thank you so much.