Unlike many other colorpickers out there, colorjoe is truly scaleable. It is based on CSS and does not depend on external images. As a result, you can tweak its size to fit your purposes. Supports touch and AMD module definition as well.
colorjoe was somewhat inspired by ColorJack and RightJS Colorpicker. Unlike those it actually scales pretty well. Essentially this means that you’ll be able to define its actual dimensions and layout using a bit of CSS. This way the widget fits well responsive layouts.
In addition it’s relatively easy to implement missing functionality (RGB fields, whatnot) thanks to the simple API it provides.