Extract RGB values from graphic override of element types

[BGP_On]

Hello!

Id' like to extract the RGB values I've set on graphic override for the colors of different "composite" building types (walls/floors/roofs) and put the in a schedule. Now I can easily put the 2D Plan Preview of the elements where I can see the colors but I'd like to follow it with the values of RGB for each color. Is there a way to do this? Thank you in advance.

I'll attach a screenshot of what I'd like the final result to be, in it you can see I've created 3 parameters each for RGB.