Writing some code to poke the Philips hue bridge wouldn’t be all that hard, it’s just a REST API, which could even be implemented in raw TCP if actual HTTP is difficult.
I might look into this since I’ve got a lot of modern programming experience, but back when I was using Mac OS 8/9 I was using REALBasic, which wasn’t really proper Mac programming, then or now (although I’ve not used XoJo so maybe I’m being a little unfair there!)
@aladds Ooo, thanks. I'm gonna archive that software.
Edit: Hehe. You've lead me down a rabbit hole using Archive.org to download and archive all the 3rd party & shareware modules released for AfterDark.