I really like the color picker function. Sometimes however, I need to go back to a previously picked color. Implementing jumping back to color which was picked before when pressing ctrl + z would be really useful.
When a color is selected in the color picker, and afterwards the user selects another color (in the color interface or by specifying another color in the boxes and pressing enter), the "undo" keyboard shortcut ctrl + z would be useful to jump back to the previously selected color.