var ui_state_default_backgroundColor = $(".ui-state-default").css( "background-color" );

var ui_state_active_backgroundColor = $(".ui-state-active").css( "background-color" );

var ui_state_error_backgroundColor = $(".ui-state-error").css( "background-color" );

var ui_state_highlight_backgroundColor = $(".ui-state-highlight").css( "background-color" );


At $(document).ready(function() ..

.ui-state-default returns rgb(254,206,47) //correct values

.ui-state-active returns undefined

.ui-state-error returns undefined

.ui-state-highlight returns undefined

At $(window).load(function()..

.ui-state-default returns rgb(255,255,255) //wrong values

.ui-state-active returns rgb(255,255,255) //wrong values

.ui-state-error returns undefined

.ui-state-highlight returns undefined

$(document).ready(function () {
  /* codes here */
}

$(document).ready(function { /* code here */ })

$(document).ready(function(){
    SetTimeout(function(){
var ui_state_default_backgroundColor = $(".ui-state-default").css( "background-color" );
var ui_state_active_backgroundColor = $(".ui-state-active").css( "background-color" );
var ui_state_error_backgroundColor = $(".ui-state-error").css( "background-color" );
var ui_state_highlight_backgroundColor = $(".ui-state-highlight").css( "background-color"       );},200);});