Didn’t have time to whip up an example, but it seems straightforward enough.
I tried sending both colour() and fontcolour() to a combobox, no result. Changed the channel to an rslider, and it worked fine.
If I send the command and then save my file from the editor window, there’s maybe a 1 in 20 chance that I’ll see the combobox change color due to that strange init timing issue I was mentioning the other night… so it’s getting to the right channel, and combobox knows what to do with the data, it just seems like it’s not forcing a graphic update when it receives something.