A color picker

Looking for a color picker for a website I am preparing, I found many commercial tools and other open source (unobfuscated js) but not free-licensed.

An open source free licensed ('it’s dual licenced under Creative Commons & GPL') color picker is the Colorjack color picker: I like more the version 1.0.4 than 2.0. .

I saw that the code in Colorjack incorporates a function $() which I would have to rename to avoid conflicts with the Prototype framework... (although I didn't actually test it) so I just looked further and found Scripteka, which is a collection of Prototype extensions. Currently there are links to 119 projects.

At least two of them are color picking related, John Dyer's Colorpicker, released in 2007 under a MIT-style license and Jeremy Jongsma's GPL-licensed Control.ColorPicker, released in April 2008.

Not all the projects linked by Scripteka are free licensed: for example Cooltips is not.

Through a comment in John Dyer's blog I came to nogray color picker which is based on another javascript framework (mooTools) and I didn't find the licensing terms.

It's a pity none of them is available as Rails plugin, maybe with some nice helper methods...