JavaScript ColorPicker is a light weight all-rounder (only ~46k incl. all 16 files) that can display and let you choose the entire color palette (~16.78 mil. colors) in 6 different color modes (+3 extra modes in RGB).

This highly customizable and easy to install app comes in 4 different sizes (from 151 x 87 pixels to 405 x 302 pixels) and therefore different feature levels so you can use it for every supposable cause from ‘easy choice’ to ‘professional determination’. That’s probably all you’ll ever need to let your clients choose the right color.

You’ll also find a lot of extra helpers and smart features like contrast-meter, color-difference-meter, value-slider in input fields, web-smart and web-save button, color memories and much more that can help your clients make the right decision.

Requirements: Javascript Enabled
Demo: http://dematte.at/colorPicker/
License: GPL License