Paste this in your JavaScript console to easily switch between Bootswatch styles to help pick the right one for your site

bootswatch-picker.js

var themes = [
	'//netdna.bootstrapcdn.com/bootswatch/3.3.6/cerulean/bootstrap.min.css',
	'//netdna.bootstrapcdn.com/bootswatch/3.3.6/cosmo/bootstrap.min.css',
	'//netdna.bootstrapcdn.com/bootswatch/3.3.6/cyborg/bootstrap.min.css',
	'//netdna.bootstrapcdn.com/bootswatch/3.3.6/darkly/bootstrap.min.css',
	'//netdna.bootstrapcdn.com/bootswatch/3.3.6/flatly/bootstrap.min.css',
	'//netdna.bootstrapcdn.com/bootswatch/3.3.6/journal/bootstrap.min.css',
	'//netdna.bootstrapcdn.com/bootswatch/3.3.6/lumen/bootstrap.min.css',
	'//netdna.bootstrapcdn.com/bootswatch/3.3.6/paper/bootstrap.min.css',
	'//netdna.bootstrapcdn.com/bootswatch/3.3.6/readable/bootstrap.min.css',
	'//netdna.bootstrapcdn.com/bootswatch/3.3.6/sandstone/bootstrap.min.css',
	'//netdna.bootstrapcdn.com/bootswatch/3.3.6/simplex/bootstrap.min.css',
	'//netdna.bootstrapcdn.com/bootswatch/3.3.6/slate/bootstrap.min.css',
	'//netdna.bootstrapcdn.com/bootswatch/3.3.6/spacelab/bootstrap.min.css',
	'//netdna.bootstrapcdn.com/bootswatch/3.3.6/superhero/bootstrap.min.css',
	'//netdna.bootstrapcdn.com/bootswatch/3.3.6/united/bootstrap.min.css',
	'//netdna.bootstrapcdn.com/bootswatch/3.3.6/yeti/bootstrap.min.css'
];
 
function useTheme(i) {
	$('link').each(function () {
		if ($(this).attr('href').indexOf('bootstrap.min.css') != -1) {
			$(this).attr('href', themes[i]);
			return false; // Break
		}
	});
}