Very nice! Almost too easy to use. I had one issue with it though: although the widget displayed correctly in my SQLFORMs, the first time I used it to pick a colour, the value wasn't sent back to the controller in the request. Every time after that worked fine. Setting a default value in the Field definition (default='#ff0000', for example) resolved this for some reason. It may have just been my code, but I'm not doing anything unusual, so I don't know.