Hi!

I think that doesn't work, because it doesn't make much sense. I think the Actions are meant to apply predefined Actions to the image. It's not made for pure administrative tasks. You can choose all colors you want with the Color Picker. The Color Samples are just some kind of Presets to choose collections of certain colors. All the colors in the Color Samples can also be set by the Color Picker. So it will not be important to choose a certain Color Sample to apply colors to the canvas. This will only be important for you if you do it by hand.

But if you want to do such presets for some paintings you are planning to paint, you could use the Toolbox for it. The Toolbox allows to save certain Color Samples.