OK, two more important requirements from my side:
a)
Customization. Rather than having a green icon with the text "green"
or a red icon with the text "red"
besides it, I would need colored icons with
custom text -- which in my case is, for example, "bill paid" (green icon) and "bill due" (red icon). Customization via *.ini file would be no problem in my view.
b)
Minimize clicks. One right click plus hovering the Folder Color Tool's context menu entry should
display the list of colors directly, without further click(s).
I'm prepared to donate because this would just make a Folder Color Tool perfect for me.