Hi @lgladdy,
When I add your code to a Javascript file that loads on the admin pages, I get the following error: ‘ReferenceError: Can’t find variable: acf’, which probably means that it’s running too early.
When I wrap is with jQuery(function () { ...your code... }
, I’m seeing different colors but not the ones that I added to the theme.json file.
Also: I need this for a colorpicker field on a term page. Should that code work there as well? I suspect it’s only working for pages where the block editor is being loaded.