Nice, I may give that a go on my Plasma setup. I tried to do something similar with a BH1745. That stalled and I never got back to it. I wanted to auto adjust the color and intensity. Right now I set the color with the buttons on an Encoder Wheel. Then adjust the brightness with the wheel (rotating ring).
Want to use a BH1745 for Ambient Lighting - Support - Pimoroni Buccaneers