script.js

var colors = {}
Cookie.set('main', '#333');

$('#main').spectrum({
  color: Cookie.get('main'), // gets the value of the 'main' cookie and sets it as the initial color
  change: function(color){
    colors.main = color.toHexString(); // returns the selected color as a hex string and assigns it to a  'main' property of the colors object
    Cookie.set('main', colors.main); // updates the value of the 'main' cookie
  }
});