jQuery Color Picker: Farbtastic
Farbtastic is a jQuery color picker plugin for easily adding a color picker into any webpage.
The picker is linked to an existing element (e.g. a text field) and updates the value of the element when a color is selected.
Layered transparent PNGs are used for rendering a saturation/luminance gradient inside of a hue circle. It is not Flash or pixel sized divs.
Compatibility: All Major Browsers