This quest literally took me several hours and had no answer yet. So any expert help will be appreciated 
I know how to change the background color of all switch nodes. Please see the following codes. But how to change the background of only the first switch? For example, I only want the background color of the first switch node to be blue. Also how to adjust the switch on icon color? say "yellow". A blue color will match the blue background, which makes the icon invisible.
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No more boring switches 
