New Twiddle

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({

});

controllers.color.js

import Ember from 'ember';

export default Ember.Controller.extend({
  queryParams: ['colorValue'],
  colorValue: 'light-blue',
  color: Ember.computed.alias('model')
  
});

router.js

import Ember from 'ember';
import config from './config/environment';

var Router = Ember.Router.extend({
  location: config.locationType
});

Router.map(function() {
  this.route('color');
});

export default Router;

routes.color.js

import Ember from 'ember';

export default Ember.Route.extend({
  model: function(params){
  	return params.colorValue || "red";
  }
});

styles.app.css

body {
  margin: 12px 16px;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 12pt;
}
.square{
  background-color: lightblue;
  color: blue;
  height: 135px;
  width: 135px;
 }

templates.application.hbs

{{#link-to 'color'}}Colorize{{/link-to}}

templates.color.hbs

<div class="square">
<p>it's rendering</p>
<h2>{{colorValue}}</h2>
</div>

twiddle.json

{
  "version": "0.4.0",
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/1.13.5/ember.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/1.13.5/ember-data.js"
  }
}