Link Magic Sheet Button to Group colour & Intensity

Hi.

Im setting up a busking magic sheet where I essentially have everything linked to 6 groups, which I just update the fixtures for. 

I need a way to represent what the console 'thinks' the group state is for changing parameters in black. Kind of like looking at a magic sheet of my fixture channels, only with groups. 

Because my fixtures may change quantities/Channel numbers, is there a way to make a square in a magic sheet look at a group. Then 'link' the color of this to a groups color? Same with intensity.
I really don't want to go down the path of adding 'copy colour to this colour palette to represent' to every one of my 30 x 6 macros

I feel like it might breaking ETC logic but it would be handy to not be backed into strict group channel numbering when touring around venues.

Cheers,

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