There are two existing ones.
One went public (hopefully), another one stays at the lab, for me
On the backside are two RGB LEDs and with keeping button one pressed you can set your favorite color.
In short:
Hue control with pressed button 1 and potentiometer.
Button 2 is for the filaments. It has two functions. Switching between party and still mode and setting the brightness for all filaments at once.
Button 2 switches between modes, keep button 2 pressed and adjust filament brightness with the potentiometer.
USB C 100mA
MCU:
RP2040