How use the Toggle color mode?

### Description of the new feature / enhancement

I installed the Toggle Dark Mode for Command Palette, but I don't know how to use it. I click on it and select any option, but nothing happens.
Is this to switch from dark mode to light or am I wrong?

### Scenario when this would be used?

Switch dark mote to light mode from the dock

### Supporting information

_No response_

Start by reproducing the Command Palette's Toggle Dark Mode behavior and checking what happens when each option is selected. Done means the dark/light mode switch works from the dock, or the issue clearly explains how to use the existing toggle.

Written by the indexing model from the issue text.