There is an RGB light on my desk. Change the colour of a desk light in my office, from anywhere. Pick a colour, and a few moments later the light in my office follows.

[open the colour picker]

how it works

• A small web page sends the chosen colour to an HTTP API.
• The API is rate limited (one change per second, for everyone) and relays it over MQTT.
• An ESP32 on the desk listens for it and drives the LEDs.

Please be nice to the light. I have to look at it.