New Twiddle

controllers.application.js

import Ember from 'ember';
import { computed } from '@ember/object';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  label: '',
  
  hashCode(str) {
    let hash = 0;
    for (let i = 0; i < str.length; i++) {
       hash = str.charCodeAt(i) + ((hash << 5) - hash);
    }
    return hash;
  },
  
  intToARGB(i){
    return ((i>>24)&0xFF).toString(16) + 
           ((i>>16)&0xFF).toString(16) + 
           ((i>>8)&0xFF).toString(16);
	},
                                       
  color: computed('label', function() { 
  	return this.intToARGB(this.hashCode(this.label));
	}),
  
  actions: {
   	updateColor(event) {
 			this.set('label', event.target.value);
    }
  }
});

templates.application.hbs

Label value:
<input value={{label}} onChange={{action 'updateColor'}} /><button>calculate color</button>
<div style="background-color: #{{color}}; width: 200px; height: 200px; border: 2px solid gray;"></div>
<hr />
Generated color hash: {{color}}

twiddle.json

{
  "version": "0.15.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.4.3",
    "ember-template-compiler": "3.4.3",
    "ember-testing": "3.4.3"
  },
  "addons": {
    "ember-data": "3.4.2"
  }
}