Jcolor is a simple vanilla JavaScript color plugin with no dependencies. Simply download the jcolor.js file, include the script in your project, and you're good to go!
Syntax
color(arg1, arg2, arg3, arg4);
arg1: html element to trigger color picker and to color by default
(optional) arg2: html element to color
(optional) arg3: array of custom colors to be used (hex values)
(optional) arg4: callback function to retrieve the color code