I could not find reference to the event that is triggered by the right mouse button in a Frame object. With the left mouse button event I select the desired color, this is working, but with the right button I would define the custom colors dynamically, but I could not find the desired event to do that.
The idea is to change the color background color to be customized (it works already) by clicking the right button on a Frame object. Each frame represents an additional color to customize (these are the sixteen blank areas at the bottom of the palette).
Is there an event corresponding to the right-click for the Frame object?
UPDATE
See the solution found in the Answer below