Why do you need to the background, since you set the background?
This is as close as I'm able to get $table->tag('cget','active','-bg'), "\n";
I thought maybe this would work as well, it does for "configure" but for cget it always returns window not found $table->window( 'cget', "$row,$col" , "-background" )
Seems like a bug in ActiveTcl 8.6b1.2 (current is 8.6.4.1/
Could tag every cell with row/col but that seems like a dumb workaround, but it would probably work
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