Steven Wittens of Drupal fame has released a nifty jQuery plugin of his own called Farbtastic. So what does it do you ask?

Farbtastic uses layered transparent PNGs to render a saturation/luminance gradient inside of a hue circle. No Flash, no pixel sized divs.

With Farbtastic, a simple form input box turns into a auto-updated hex code whose background color changes accordingly with the clickable color wheel and block added by the 8kb Javascript file. Click the color, drag the chooser or enter in a hex code manually.

Just include the farbtastic.js file along with the farbtastic.css stylesheet and create a placeholder div along with a form element for the hex code like so:

<form>
    <input type="text" ... />
</form>
<div id="colorpicker"></div>

And then include the one line jQuery code:

$('#colorpicker').farbtastic('#colorpickerinput');

That’s all there is to it! You should now have a color picker widget on your page.

To see a working demo as well as more in depth instructions on using the plugin, visit the Farbtastic page. Farbtastic is protected by the GPL.