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I do not know how to do what you want with an Action other than what I had posted in your previous post/thread.

If double-clicking is an issue, the Foreground Color Picker can be set up to open with a single Key Shortcut, and then the sequence would be

1) Select the Solid Color Layer you want to change

2) Click the Keyboard shortcut to open Foreground Color Picker

3)  Manually select the desired color

4)Hit the return Key to close Color Picker, which accepts the new color into the Solid Color Layer

If you stay on the same Layer, repeat starting at #2.

I may not know all the shortcut keys when using a Layer Style, which could make it more efficient.

I will leave it at that since I believe that is the limit of my knowledge of the direction you have chosen.

Best wishes on your project I and hope another Forum member can add a good solution for you.

John Wheeler