Sample titanium searchbar with remote change of layout

sample1.js

var searchbar = Ti.UI.createSearchBar({
	showCancel: true,
	barColor: '#7CA122' // This is the default color if no remote source is used / found
});

// get the colors.json source
Ajax.xhr('GET', '', 'http://localhost/colors.json', function(data) {
	searchbar.barColor = data.Colors.someColor; // change the searchbar color
	win.barColor = data.Colors.otherColor; // change the window bar color
});

Obviously you'd want to wrap this in a conditional if those properties weren't available in the json feed.