Change the lights on the [thing]!
The color picker is generated by your browser, and may vary. Just click on the color box to start. Find a color, select it, then press the SEND button to change the color. If we have a camera on the object, it may take up to a minute to see the change. Patience, padawan.
So, how does this work? Read on.
(Note: I am trying to resolve some caching issues so you get the latest image. If the image doesn't load, then go ahead and refresh your browser. Also, the image load may lag a bit behind the page refresh. If you see in the browser tab that the page is still loading, then give it a few seconds. Also, the page will refresh as soon as you hit the "send" button, but it still may take up to a minute for the Arduino script in the [thing] to catch up.)